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[o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Log in</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pages for logged out editors <a href="/wiki/Help:Introduction" aria-label="Learn more about editing"><span>learn more</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Special:MyContributions" title="A list of edits made from this IP address [y]" accesskey="y"><span>Contributions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Special:MyTalk" title="Discussion about edits from this IP address [n]" accesskey="n"><span>Talk</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div 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data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Top)</div> </a> </li> <li id="toc-Policy" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Policy"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Policy</span> </div> </a> <button aria-controls="toc-Policy-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Policy subsection</span> </button> <ul id="toc-Policy-sublist" class="vector-toc-list"> <li id="toc-Grounds_for_checking" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Grounds_for_checking"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>Grounds for checking</span> </div> </a> <ul id="toc-Grounds_for_checking-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Notifying_the_account_that_is_checked" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Notifying_the_account_that_is_checked"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>Notifying the account that is checked</span> </div> </a> <ul id="toc-Notifying_the_account_that_is_checked-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-CheckUser_and_the_privacy_policy" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#CheckUser_and_the_privacy_policy"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>CheckUser and the privacy policy</span> </div> </a> <button aria-controls="toc-CheckUser_and_the_privacy_policy-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle CheckUser and the privacy policy subsection</span> </button> <ul id="toc-CheckUser_and_the_privacy_policy-sublist" class="vector-toc-list"> <li id="toc-IP_information_disclosure" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#IP_information_disclosure"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>IP information disclosure</span> </div> </a> <ul id="toc-IP_information_disclosure-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-IP_information_retention" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#IP_information_retention"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>IP information retention</span> </div> </a> <ul id="toc-IP_information_retention-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Guidance_given_to_checkusers" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Guidance_given_to_checkusers"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3</span> <span>Guidance given to checkusers</span> </div> </a> <ul id="toc-Guidance_given_to_checkusers-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Fishing" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Fishing"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.4</span> <span>Fishing</span> </div> </a> <ul id="toc-Fishing-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Contacting_a_checkuser" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Contacting_a_checkuser"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Contacting a checkuser</span> </div> </a> <ul id="toc-Contacting_a_checkuser-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-CheckUser_operation" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#CheckUser_operation"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>CheckUser operation</span> </div> </a> <button aria-controls="toc-CheckUser_operation-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle CheckUser operation subsection</span> </button> <ul id="toc-CheckUser_operation-sublist" class="vector-toc-list"> <li id="toc-Usage" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Usage"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Usage</span> </div> </a> <ul id="toc-Usage-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Guide_to_checkusers" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Guide_to_checkusers"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2</span> <span>Guide to checkusers</span> </div> </a> <ul id="toc-Guide_to_checkusers-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Reasons_and_communication" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Reasons_and_communication"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.3</span> <span>Reasons and communication</span> </div> </a> <ul id="toc-Reasons_and_communication-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-CheckUser_blocks" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#CheckUser_blocks"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.4</span> <span>CheckUser blocks</span> </div> </a> <ul id="toc-CheckUser_blocks-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Log_of_checks" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Log_of_checks"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.5</span> <span>Log of checks</span> </div> </a> <ul id="toc-Log_of_checks-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Assignment_and_revocation" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Assignment_and_revocation"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.6</span> <span>Assignment and revocation</span> </div> </a> <ul id="toc-Assignment_and_revocation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Complaints_and_misuse" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Complaints_and_misuse"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.7</span> <span>Complaints and misuse</span> </div> </a> <ul id="toc-Complaints_and_misuse-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Users_with_checkuser_permissions" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Users_with_checkuser_permissions"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Users with checkuser permissions</span> </div> </a> <ul id="toc-Users_with_checkuser_permissions-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Notes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Notes"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Notes</span> </div> </a> <ul id="toc-Notes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-namespace">Wikipedia</span><span class="mw-page-title-separator">:</span><span class="mw-page-title-main">CheckUser</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 62 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-62" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">62 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%88%D9%8A%D9%83%D9%8A%D8%A8%D9%8A%D8%AF%D9%8A%D8%A7:%D8%AA%D8%AF%D9%82%D9%8A%D9%82_%D9%85%D8%B3%D8%AA%D8%AE%D8%AF%D9%85" title="ويكيبيديا:تدقيق مستخدم – Arabic" lang="ar" hreflang="ar" data-title="ويكيبيديا:تدقيق مستخدم" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Vikipediya:T%C9%99fti%C5%9F%C3%A7il%C9%99r" title="Vikipediya:Təftişçilər – Azerbaijani" lang="az" hreflang="az" data-title="Vikipediya:Təftişçilər" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbaijani" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D9%88%DB%8C%DA%A9%DB%8C%E2%80%8C%D9%BE%D8%AF%DB%8C%D8%A7:%D8%AA%D9%81%D8%AA%DB%8C%D8%B4%DA%86%DB%8C%D9%84%D8%B1" title="ویکی‌پدیا:تفتیشچیلر – South Azerbaijani" lang="azb" hreflang="azb" data-title="ویکی‌پدیا:تفتیشچیلر" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%89%E0%A6%87%E0%A6%95%E0%A6%BF%E0%A6%AA%E0%A6%BF%E0%A6%A1%E0%A6%BF%E0%A6%AF%E0%A6%BC%E0%A6%BE:%E0%A6%AC%E0%A7%8D%E0%A6%AF%E0%A6%AC%E0%A6%B9%E0%A6%BE%E0%A6%B0%E0%A6%95%E0%A6%BE%E0%A6%B0%E0%A7%80_%E0%A6%AA%E0%A6%B0%E0%A7%80%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A6%95" title="উইকিপিডিয়া:ব্যবহারকারী পরীক্ষক – Bangla" lang="bn" hreflang="bn" data-title="উইকিপিডিয়া:ব্যবহারকারী পরীক্ষক" data-language-autonym="বাংলা" data-language-local-name="Bangla" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bjn mw-list-item"><a href="https://bjn.wikipedia.org/wiki/Wikipidia:Pamariksa" title="Wikipidia:Pamariksa – Banjar" lang="bjn" hreflang="bjn" data-title="Wikipidia:Pamariksa" data-language-autonym="Banjar" data-language-local-name="Banjar" class="interlanguage-link-target"><span>Banjar</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A3%D0%B8%D0%BA%D0%B8%D0%BF%D0%B5%D0%B4%D0%B8%D1%8F:%D0%9F%D1%80%D0%BE%D0%B2%D0%B5%D1%80%D1%8F%D0%B2%D0%B0%D1%89%D0%B8" title="Уикипедия:Проверяващи – Bulgarian" lang="bg" hreflang="bg" data-title="Уикипедия:Проверяващи" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Wikipedia:Provjerava%C4%8D" title="Wikipedia:Provjeravač – Bosnian" lang="bs" hreflang="bs" data-title="Wikipedia:Provjeravač" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Wikipedia:Gwiriekaer_chomlec%27h_IP/Reked" title="Wikipedia:Gwiriekaer chomlec'h IP/Reked – Breton" lang="br" hreflang="br" data-title="Wikipedia:Gwiriekaer chomlec'h IP/Reked" data-language-autonym="Brezhoneg" data-language-local-name="Breton" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Viquip%C3%A8dia:Verificador_de_comptes_d%27usuari" title="Viquipèdia:Verificador de comptes d'usuari – Catalan" lang="ca" hreflang="ca" data-title="Viquipèdia:Verificador de comptes d'usuari" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Wikipedie:Revizo%C5%99i" title="Wikipedie:Revizoři – Czech" lang="cs" hreflang="cs" data-title="Wikipedie:Revizoři" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Wikipedia:Tjekbrugere" title="Wikipedia:Tjekbrugere – Danish" lang="da" hreflang="da" data-title="Wikipedia:Tjekbrugere" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D9%88%D9%8A%D9%83%D9%8A%D9%BE%D9%8A%D8%AF%D9%8A%D8%A7:%D8%AA%D8%AF%D9%82%D9%8A%D9%82_%D9%85%D8%B3%D8%AA%D8%AE%D8%AF%D9%85" title="ويكيپيديا:تدقيق مستخدم – Moroccan Arabic" lang="ary" hreflang="ary" data-title="ويكيپيديا:تدقيق مستخدم" data-language-autonym="الدارجة" data-language-local-name="Moroccan Arabic" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Wikipedia:Checkuser" title="Wikipedia:Checkuser – German" lang="de" hreflang="de" data-title="Wikipedia:Checkuser" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%92%CE%B9%CE%BA%CE%B9%CF%80%CE%B1%CE%AF%CE%B4%CE%B5%CE%B9%CE%B1:CheckUser" title="Βικιπαίδεια:CheckUser – Greek" lang="el" hreflang="el" data-title="Βικιπαίδεια:CheckUser" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-eml mw-list-item"><a href="https://eml.wikipedia.org/wiki/Wikipedia:Check_user" title="Wikipedia:Check user – Emiliano-Romagnolo" lang="egl" hreflang="egl" data-title="Wikipedia:Check user" data-language-autonym="Emiliàn e rumagnòl" data-language-local-name="Emiliano-Romagnolo" class="interlanguage-link-target"><span>Emiliàn e rumagnòl</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Wikipedia:Checkusers" title="Wikipedia:Checkusers – Spanish" lang="es" hreflang="es" data-title="Wikipedia:Checkusers" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Vikipedio:Kontrolantoj" title="Vikipedio:Kontrolantoj – Esperanto" lang="eo" hreflang="eo" data-title="Vikipedio:Kontrolantoj" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%88%DB%8C%DA%A9%DB%8C%E2%80%8C%D9%BE%D8%AF%DB%8C%D8%A7:%D8%A8%D8%A7%D8%B2%D8%B1%D8%B3%D8%A7%D9%86_%DA%A9%D8%A7%D8%B1%D8%A8%D8%B1" title="ویکی‌پدیا:بازرسان کاربر – Persian" lang="fa" hreflang="fa" data-title="ویکی‌پدیا:بازرسان کاربر" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Wikip%C3%A9dia:V%C3%A9rificateur_d%27utilisateurs" title="Wikipédia:Vérificateur d'utilisateurs – French" lang="fr" hreflang="fr" data-title="Wikipédia:Vérificateur d'utilisateurs" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Wikipedia:Verificadores_de_usuarios" title="Wikipedia:Verificadores de usuarios – Galician" lang="gl" hreflang="gl" data-title="Wikipedia:Verificadores de usuarios" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC:%EA%B2%80%EC%82%AC%EA%B4%80" title="위키백과:검사관 – Korean" lang="ko" hreflang="ko" data-title="위키백과:검사관" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Wikipedija:Provjeritelji" title="Wikipedija:Provjeritelji – Croatian" lang="hr" hreflang="hr" data-title="Wikipedija:Provjeritelji" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Wikipedia:Pemeriksa" title="Wikipedia:Pemeriksa – Indonesian" lang="id" hreflang="id" data-title="Wikipedia:Pemeriksa" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Wikipedia:Check_user" title="Wikipedia:Check user – Italian" lang="it" hreflang="it" data-title="Wikipedia:Check user" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%95%D7%99%D7%A7%D7%99%D7%A4%D7%93%D7%99%D7%94:%D7%91%D7%95%D7%93%D7%A7" title="ויקיפדיה:בודק – Hebrew" lang="he" hreflang="he" data-title="ויקיפדיה:בודק" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-lij mw-list-item"><a href="https://lij.wikipedia.org/wiki/Wikipedia:Check_users" title="Wikipedia:Check users – Ligurian" lang="lij" hreflang="lij" data-title="Wikipedia:Check users" data-language-autonym="Ligure" data-language-local-name="Ligurian" class="interlanguage-link-target"><span>Ligure</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%B5%E0%B4%BF%E0%B4%95%E0%B5%8D%E0%B4%95%E0%B4%BF%E0%B4%AA%E0%B5%80%E0%B4%A1%E0%B4%BF%E0%B4%AF:%E0%B4%9A%E0%B5%86%E0%B4%95%E0%B5%8D%E0%B4%95%E0%B5%8D_%E0%B4%AF%E0%B5%82%E0%B4%B8%E0%B5%BC" title="വിക്കിപീഡിയ:ചെക്ക് യൂസർ – Malayalam" lang="ml" hreflang="ml" data-title="വിക്കിപീഡിയ:ചെക്ക് യൂസർ" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%B5%E0%A4%BF%E0%A4%95%E0%A4%BF%E0%A4%AA%E0%A5%80%E0%A4%A1%E0%A4%BF%E0%A4%AF%E0%A4%BE:%E0%A4%B8%E0%A4%A6%E0%A4%B8%E0%A5%8D%E0%A4%AF%E0%A4%A4%E0%A5%8D%E0%A4%B5_%E0%A4%A4%E0%A4%AA%E0%A4%BE%E0%A4%B8%E0%A4%A8%E0%A4%BF%E0%A4%B8" title="विकिपीडिया:सदस्यत्व तपासनिस – Marathi" lang="mr" hreflang="mr" data-title="विकिपीडिया:सदस्यत्व तपासनिस" data-language-autonym="मराठी" data-language-local-name="Marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D9%88%D9%8A%D9%83%D9%8A%D8%A8%D9%8A%D8%AF%D9%8A%D8%A7:%D8%AA%D8%B4%D9%8A%D9%8A%D9%83_%D8%A7%D9%84%D9%8A%D9%88%D8%B2%D8%B1" title="ويكيبيديا:تشييك اليوزر – Egyptian Arabic" lang="arz" hreflang="arz" data-title="ويكيبيديا:تشييك اليوزر" data-language-autonym="مصرى" data-language-local-name="Egyptian Arabic" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Wikipedia:Pemeriksa" title="Wikipedia:Pemeriksa – Malay" lang="ms" hreflang="ms" data-title="Wikipedia:Pemeriksa" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Wikipedia:Checkuser" title="Wikipedia:Checkuser – Dutch" lang="nl" hreflang="nl" data-title="Wikipedia:Checkuser" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikipedia.org/wiki/%E0%A4%B5%E0%A4%BF%E0%A4%95%E0%A4%BF%E0%A4%AA%E0%A4%BF%E0%A4%A1%E0%A4%BF%E0%A4%AF%E0%A4%BE:%E0%A4%AA%E0%A5%8D%E0%A4%B0%E0%A4%AF%E0%A5%8B%E0%A4%97%E0%A4%95%E0%A4%B0%E0%A5%8D%E0%A4%A4%E0%A4%BE_%E0%A4%9C%E0%A4%BE%E0%A4%81%E0%A4%9A" title="विकिपिडिया:प्रयोगकर्ता जाँच – Nepali" lang="ne" hreflang="ne" data-title="विकिपिडिया:प्रयोगकर्ता जाँच" data-language-autonym="नेपाली" data-language-local-name="Nepali" class="interlanguage-link-target"><span>नेपाली</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/Wikipedia:%E3%83%81%E3%82%A7%E3%83%83%E3%82%AF%E3%83%A6%E3%83%BC%E3%82%B6%E3%83%BC%E3%81%AE%E6%96%B9%E9%87%9D" title="Wikipedia:チェックユーザーの方針 – Japanese" lang="ja" hreflang="ja" data-title="Wikipedia:チェックユーザーの方針" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Wikipedia:CheckUser" title="Wikipedia:CheckUser – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Wikipedia:CheckUser" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Wikip%C3%A8dia:Verificator_d%27adre%C3%A7as_IP/Requ%C3%A8stas" title="Wikipèdia:Verificator d'adreças IP/Requèstas – Occitan" lang="oc" hreflang="oc" data-title="Wikipèdia:Verificator d'adreças IP/Requèstas" data-language-autonym="Occitan" data-language-local-name="Occitan" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Vikipediya:Foydalanuvchilarni_tekshiruvchilar" title="Vikipediya:Foydalanuvchilarni tekshiruvchilar – Uzbek" lang="uz" hreflang="uz" data-title="Vikipediya:Foydalanuvchilarni tekshiruvchilar" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D9%88%D9%8A%DA%A9%D9%8A%D9%BE%DB%90%DA%89%D9%8A%D8%A7:%DA%A9%D8%B1%D9%87_%DA%A9%D8%AA%D9%88%D9%86%DA%A9%D9%8A_%DA%A9%D8%A7%D8%B1%D9%86%D8%A7%D9%86" title="ويکيپېډيا:کره کتونکي کارنان – Pashto" lang="ps" hreflang="ps" data-title="ويکيپېډيا:کره کتونکي کارنان" data-language-autonym="پښتو" data-language-local-name="Pashto" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Wikipedia:Checkuser-Brukers" title="Wikipedia:Checkuser-Brukers – Low German" lang="nds" hreflang="nds" data-title="Wikipedia:Checkuser-Brukers" data-language-autonym="Plattdüütsch" data-language-local-name="Low German" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Wikipedia:Checkuserzy" title="Wikipedia:Checkuserzy – Polish" lang="pl" hreflang="pl" data-title="Wikipedia:Checkuserzy" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Wikip%C3%A9dia:CheckUser" title="Wikipédia:CheckUser – Portuguese" lang="pt" hreflang="pt" data-title="Wikipédia:CheckUser" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Wikipedia:Checkuser" title="Wikipedia:Checkuser – Romanian" lang="ro" hreflang="ro" data-title="Wikipedia:Checkuser" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Wikipedia:CheckUser" title="Wikipedia:CheckUser – Albanian" lang="sq" hreflang="sq" data-title="Wikipedia:CheckUser" data-language-autonym="Shqip" data-language-local-name="Albanian" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Wikipedia:Checkuser" title="Wikipedia:Checkuser – Sicilian" lang="scn" hreflang="scn" data-title="Wikipedia:Checkuser" data-language-autonym="Sicilianu" data-language-local-name="Sicilian" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B7%80%E0%B7%92%E0%B6%9A%E0%B7%92%E0%B6%B4%E0%B7%93%E0%B6%A9%E0%B7%92%E0%B6%BA%E0%B7%8F:%E0%B6%A0%E0%B7%99%E0%B6%9A%E0%B7%8A%E0%B6%BA%E0%B7%96%E0%B7%83%27" title="විකිපීඩියා:චෙක්යූස' – Sinhala" lang="si" hreflang="si" data-title="විකිපීඩියා:චෙක්යූස'" data-language-autonym="සිංහල" data-language-local-name="Sinhala" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Wikip%C3%A9dia:Rev%C3%ADzia_pou%C5%BE%C3%ADvate%C4%BEa" title="Wikipédia:Revízia používateľa – Slovak" lang="sk" hreflang="sk" data-title="Wikipédia:Revízia používateľa" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Wikipedija:Preverjevalci_uporabnikov" title="Wikipedija:Preverjevalci uporabnikov – Slovenian" lang="sl" hreflang="sl" data-title="Wikipedija:Preverjevalci uporabnikov" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D9%88%DB%8C%DA%A9%DB%8C%D9%BE%DB%8C%D8%AF%DB%8C%D8%A7:%D9%BE%D8%B4%DA%A9%D9%86%DB%95%D8%B1%DB%8C_%D8%A8%DB%95%DA%A9%D8%A7%D8%B1%DA%BE%DB%8E%D9%86%DB%95%D8%B1" title="ویکیپیدیا:پشکنەری بەکارھێنەر – Central Kurdish" lang="ckb" hreflang="ckb" data-title="ویکیپیدیا:پشکنەری بەکارھێنەر" data-language-autonym="کوردی" data-language-local-name="Central Kurdish" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%92%D0%B8%D0%BA%D0%B8%D0%BF%D0%B5%D0%B4%D0%B8%D1%98%D0%B0:%D0%9F%D1%80%D0%BE%D0%B2%D0%B5%D1%80%D0%B0%D0%B2%D0%B0%D1%87%D0%B8" title="Википедија:Проверавачи – Serbian" lang="sr" hreflang="sr" data-title="Википедија:Проверавачи" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/Wikipedia:Pamariksa" title="Wikipedia:Pamariksa – Sundanese" lang="su" hreflang="su" data-title="Wikipedia:Pamariksa" data-language-autonym="Sunda" data-language-local-name="Sundanese" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Wikipedia:Osoitepaljastin" title="Wikipedia:Osoitepaljastin – Finnish" lang="fi" hreflang="fi" data-title="Wikipedia:Osoitepaljastin" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Wikipedia:IP-kontrollanter" title="Wikipedia:IP-kontrollanter – Swedish" lang="sv" hreflang="sv" data-title="Wikipedia:IP-kontrollanter" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%A7%E0%B8%B4%E0%B8%81%E0%B8%B4%E0%B8%9E%E0%B8%B5%E0%B9%80%E0%B8%94%E0%B8%B5%E0%B8%A2:%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B8%95%E0%B8%A3%E0%B8%A7%E0%B8%88%E0%B8%AA%E0%B8%AD%E0%B8%9A%E0%B8%9C%E0%B8%B9%E0%B9%89%E0%B9%83%E0%B8%8A%E0%B9%89" title="วิกิพีเดีย:การตรวจสอบผู้ใช้ – Thai" lang="th" hreflang="th" data-title="วิกิพีเดีย:การตรวจสอบผู้ใช้" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Vikipedi:Denet%C3%A7iler" title="Vikipedi:Denetçiler – Turkish" lang="tr" hreflang="tr" data-title="Vikipedi:Denetçiler" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%92%D1%96%D0%BA%D1%96%D0%BF%D0%B5%D0%B4%D1%96%D1%8F:%D0%A7%D0%B5%D0%BA%27%D1%8E%D0%B7%D0%B5%D1%80%D0%B8" title="Вікіпедія:Чек'юзери – Ukrainian" lang="uk" hreflang="uk" data-title="Вікіпедія:Чек'юзери" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D9%88%DB%8C%DA%A9%DB%8C%D9%BE%DB%8C%DA%88%DB%8C%D8%A7:%D8%B5%D8%A7%D8%B1%D9%81_%D9%BE%DA%91%D8%AA%D8%A7%D9%84" title="ویکیپیڈیا:صارف پڑتال – Urdu" lang="ur" hreflang="ur" data-title="ویکیپیڈیا:صارف پڑتال" data-language-autonym="اردو" data-language-local-name="Urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-vec mw-list-item"><a href="https://vec.wikipedia.org/wiki/Wikipedia:Check_user" title="Wikipedia:Check user – Venetian" lang="vec" hreflang="vec" data-title="Wikipedia:Check user" data-language-autonym="Vèneto" data-language-local-name="Venetian" class="interlanguage-link-target"><span>Vèneto</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Wikipedia:CheckUser" title="Wikipedia:CheckUser – Vietnamese" lang="vi" hreflang="vi" data-title="Wikipedia:CheckUser" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/Wikipedia:%E7%94%A8%E6%88%B6%E6%9F%A5%E6%A0%B8" title="Wikipedia:用戶查核 – Wu" lang="wuu" hreflang="wuu" data-title="Wikipedia:用戶查核" data-language-autonym="吴语" data-language-local-name="Wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/%D7%B0%D7%99%D7%A7%D7%99%D7%A4%D6%BC%D7%A2%D7%93%D7%99%D7%A2:%D7%98%D7%A9%D7%A2%D7%A7%D7%99%D7%95%D7%96%D7%A2%D7%A8" title="װיקיפּעדיע:טשעקיוזער – Yiddish" lang="yi" hreflang="yi" data-title="װיקיפּעדיע:טשעקיוזער" data-language-autonym="ייִדיש" data-language-local-name="Yiddish" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/Wikipedia:%E7%94%A8%E6%88%B6%E7%A8%BD%E6%9F%A5" title="Wikipedia:用戶稽查 – Cantonese" lang="yue" hreflang="yue" data-title="Wikipedia:用戶稽查" data-language-autonym="粵語" data-language-local-name="Cantonese" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/Wikipedia:%E7%94%A8%E6%88%B6%E6%9F%A5%E6%A0%B8%E6%96%B9%E9%87%9D" title="Wikipedia:用戶查核方針 – Chinese" lang="zh" hreflang="zh" data-title="Wikipedia:用戶查核方針" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-bew mw-list-item"><a href="https://bew.wikipedia.org/wiki/Wikip%C3%A9di:Tukang_per%C3%A8ksa" title="Wikipédi:Tukang perèksa – Betawi" lang="bew" hreflang="bew" data-title="Wikipédi:Tukang perèksa" data-language-autonym="Betawi" data-language-local-name="Betawi" class="interlanguage-link-target"><span>Betawi</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q4049038#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-project" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Wikipedia:CheckUser" title="View the project page [c]" accesskey="c"><span>Project page</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Wikipedia_talk:CheckUser" rel="discussion" title="Discuss improvements to the content page [t]" accesskey="t"><span>Talk</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Change language variant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">English</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Views"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Wikipedia:CheckUser"><span>Read</span></a></li><li id="ca-viewsource" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Wikipedia:CheckUser&action=edit" title="This page is protected.
You can view its source [e]" accesskey="e"><span>View source</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Wikipedia:CheckUser&action=history" title="Past revisions of this page [h]" accesskey="h"><span>View history</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Tools" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Tools</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Tools</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">hide</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="More options" > <div class="vector-menu-heading"> Actions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Wikipedia:CheckUser"><span>Read</span></a></li><li id="ca-more-viewsource" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Wikipedia:CheckUser&action=edit"><span>View source</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Wikipedia:CheckUser&action=history"><span>View history</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:WhatLinksHere/Wikipedia:CheckUser" title="List of all English Wikipedia pages containing links to this page [j]" accesskey="j"><span>What links here</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:RecentChangesLinked/Wikipedia:CheckUser" rel="nofollow" title="Recent changes in pages linked from this page [k]" accesskey="k"><span>Related changes</span></a></li><li id="t-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_Upload_Wizard" title="Upload files [u]" accesskey="u"><span>Upload file</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Special:SpecialPages" title="A list of all special pages [q]" accesskey="q"><span>Special pages</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Wikipedia:CheckUser&oldid=1257450897" title="Permanent link to this revision of this page"><span>Permanent link</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Wikipedia:CheckUser&action=info" title="More information about this page"><span>Page information</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FWikipedia%3ACheckUser"><span>Get shortened URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FWikipedia%3ACheckUser"><span>Download QR code</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Print/export </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&page=Wikipedia%3ACheckUser&action=show-download-screen" title="Download this page as a PDF file"><span>Download as PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Wikipedia:CheckUser&printable=yes" title="Printable version of this page [p]" accesskey="p"><span>Printable version</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In other projects </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Commons:Checkusers" hreflang="en"><span>Wikimedia Commons</span></a></li><li class="wb-otherproject-link wb-otherproject-mediawiki mw-list-item"><a href="https://www.mediawiki.org/wiki/Project:CheckUser" hreflang="en"><span>MediaWiki</span></a></li><li class="wb-otherproject-link wb-otherproject-meta mw-list-item"><a href="https://meta.wikimedia.org/wiki/Meta:CheckUsers" hreflang="en"><span>Meta-Wiki</span></a></li><li class="wb-otherproject-link wb-otherproject-species mw-list-item"><a href="https://species.wikimedia.org/wiki/Wikispecies:Checkusers" hreflang="en"><span>Wikispecies</span></a></li><li class="wb-otherproject-link wb-otherproject-wikidata mw-list-item"><a href="https://www.wikidata.org/wiki/Wikidata:CheckUser" hreflang="en"><span>Wikidata</span></a></li><li class="wb-otherproject-link wb-otherproject-wikifunctions mw-list-item"><a href="https://www.wikifunctions.org/wiki/Wikifunctions:Check_users" hreflang="en"><span>Wikifunctions</span></a></li><li class="wb-otherproject-link wb-otherproject-wikimania mw-list-item"><a href="https://wikimania.wikimedia.org/wiki/Wikimania:Check_user" hreflang="en"><span>Wikimania</span></a></li><li class="wb-otherproject-link wb-otherproject-wikiversity mw-list-item"><a href="https://en.wikiversity.org/wiki/Wikiversity:CheckUser_policy" hreflang="en"><span>Wikiversity</span></a></li><li class="wb-otherproject-link wb-otherproject-wikivoyage mw-list-item"><a href="https://en.wikivoyage.org/wiki/Wikivoyage:CheckUser" hreflang="en"><span>Wikivoyage</span></a></li><li class="wb-otherproject-link wb-otherproject-wiktionary mw-list-item"><a href="https://en.wiktionary.org/wiki/Wiktionary:CheckUsers" hreflang="en"><span>Wiktionary</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q4049038" title="Structured data on this page hosted by Wikidata [g]" accesskey="g"><span>Wikidata item</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> <div id="mw-indicator-pp-default" class="mw-indicator"><div class="mw-parser-output"><span typeof="mw:File"><a href="/wiki/Wikipedia:Protection_policy#semi" title="This page is semi-protected."><img alt="Page semi-protected" src="//upload.wikimedia.org/wikipedia/en/thumb/1/1b/Semi-protection-shackle.svg/20px-Semi-protection-shackle.svg.png" decoding="async" width="20" height="20" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/1/1b/Semi-protection-shackle.svg/30px-Semi-protection-shackle.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/1/1b/Semi-protection-shackle.svg/40px-Semi-protection-shackle.svg.png 2x" data-file-width="512" data-file-height="512" /></a></span></div></div> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">"WP:CHECK" redirects here. For the WikiProject, see <a href="/wiki/Wikipedia:WikiProject_Check_Wikipedia" title="Wikipedia:WikiProject Check Wikipedia">Wikipedia:WikiProject Check Wikipedia</a>.</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">For the encyclopedic article about the CheckUser tool, see <a href="/wiki/CheckUser" title="CheckUser">CheckUser</a>.</div> <div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Procedural policy of Wikipedia</div> <style data-mw-deduplicate="TemplateStyles:r1238436933">.mw-parser-output .ombox{margin:4px 0;border-collapse:collapse;border:1px solid #a2a9b1;background-color:var(--background-color-neutral-subtle,#f8f9fa);box-sizing:border-box;color:var(--color-base,#202122)}.mw-parser-output .ombox.mbox-small{font-size:88%;line-height:1.25em}.mw-parser-output .ombox-speedy{border:2px solid #b32424;background-color:#fee7e6}.mw-parser-output .ombox-delete{border:2px solid #b32424}.mw-parser-output .ombox-content{border:1px solid #f28500}.mw-parser-output .ombox-style{border:1px solid #fc3}.mw-parser-output .ombox-move{border:1px solid #9932cc}.mw-parser-output .ombox-protection{border:2px solid #a2a9b1}.mw-parser-output .ombox .mbox-text{border:none;padding:0.25em 0.9em;width:100%}.mw-parser-output .ombox .mbox-image{border:none;padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .ombox .mbox-imageright{border:none;padding:2px 0.9em 2px 0;text-align:center}.mw-parser-output .ombox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ombox .mbox-invalid-type{text-align:center}@media(min-width:720px){.mw-parser-output .ombox{margin:4px 10%}.mw-parser-output .ombox.mbox-small{clear:right;float:right;margin:4px 0 4px 1em;width:238px}}body.skin--responsive .mw-parser-output table.ombox img{max-width:none!important}@media screen{html.skin-theme-clientpref-night .mw-parser-output .ombox-speedy{background-color:#310402}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .ombox-speedy{background-color:#310402}}</style><table class="box-Warning plainlinks ombox ombox-content" role="presentation"><tbody><tr><td class="mbox-image"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/b/b4/Ambox_important.svg/40px-Ambox_important.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/b/b4/Ambox_important.svg/60px-Ambox_important.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/b/b4/Ambox_important.svg/80px-Ambox_important.svg.png 2x" data-file-width="40" data-file-height="40"/></span></span></td><td class="mbox-text" style="text-align: left;">To <b>contact a checkuser about sensitive matters</b>, see <a href="#Contacting_a_checkuser">Contacting a checkuser</a>. Otherwise, to open an investigation, go to <a href="/wiki/Wikipedia:Sockpuppet_investigations" title="Wikipedia:Sockpuppet investigations">Wikipedia:Sockpuppet investigations</a>.</td></tr></tbody></table> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238436933"><table class="plainlinks ombox ombox-notice" role="presentation"><tbody><tr><td class="mbox-image"><span typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/03/Green_check.svg/30px-Green_check.svg.png" decoding="async" width="30" height="30" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/03/Green_check.svg/45px-Green_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/03/Green_check.svg/60px-Green_check.svg.png 2x" data-file-width="600" data-file-height="600"/></span></span></td><td class="mbox-text"><b>This page documents a <a href="/wiki/Wikipedia:List_of_policies#Procedural" title="Wikipedia:List of policies">procedural policy</a> of Wikipedia.</b><br/><div style="font-size: 90%;">It documents various processes by which the English Wikipedia operates.</div> This local policy supplements—but cannot override—the <a href="https://meta.wikimedia.org/wiki/CheckUser_policy#CheckUser_status" class="extiw" title="m:CheckUser policy">global community CheckUser policy</a>.</td><td class="mbox-imageright"><style data-mw-deduplicate="TemplateStyles:r1252059228">.mw-parser-output .module-shortcutboxplain{float:right;margin:0 0 0 1em;border:1px solid var(--border-color-base,#a2a9b1);background-color:var(--background-color-base,#fff);padding:0.3em 0.6em 0.2em 0.6em;text-align:center;font-size:85%}.mw-parser-output .module-shortcutboxleft{float:left;margin:0 1em 0 0}.mw-parser-output .module-shortcutlist{display:inline-block;border-bottom:1px solid var(--border-color-base,#a2a9b1);margin-bottom:0.2em}.mw-parser-output .module-shortcutboxplain ul{font-weight:bold}.mw-parser-output .module-shortcutanchordiv{position:relative;top:-3em}.mw-parser-output li .module-shortcutanchordiv{float:right}.mw-parser-output .mbox-imageright .module-shortcutboxplain{padding:0.4em 1em 0.4em 1em;line-height:1.3;margin:0}</style><div class="module-shortcutanchordiv"><span id="WP:CHK"></span><span id="WP:CHECK"></span></div><div class="module-shortcutboxplain noprint" role="note"><div class="module-shortcutlist"><a href="/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcuts</a></div><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style><div class="plainlist"><ul><li><span class="plainlinks"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Wikipedia:CHK&redirect=no">WP:CHK</a></span></li><li><span class="plainlinks"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Wikipedia:CHECK&redirect=no">WP:CHECK</a></span></li></ul></div></div></td></tr></tbody></table> <figure typeof="mw:File/Thumb"><a href="/wiki/File:Wikipedia_Checkuser.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b5/Wikipedia_Checkuser.svg/200px-Wikipedia_Checkuser.svg.png" decoding="async" width="200" height="183" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b5/Wikipedia_Checkuser.svg/300px-Wikipedia_Checkuser.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b5/Wikipedia_Checkuser.svg/400px-Wikipedia_Checkuser.svg.png 2x" data-file-width="103" data-file-height="94"/></a><figcaption>Logo for the Wikipedia CheckUser tool and the checkuser team</figcaption></figure> <p>The <b>CheckUser</b> tool is used by a small group of trusted Wikipedia users (called <b>checkusers</b>). The tool allows its users to determine from Wikipedia's servers the <a href="/wiki/IP_address" title="IP address">IP addresses</a> used by a Wikipedia user account, as well as other technical data stored by the server about a user account or IP address. </p><p>Wikipedia's checkuser team uses the tool to establish whether two or more accounts are being operated <a href="/wiki/Wikipedia:Sock_puppetry" class="mw-redirect" title="Wikipedia:Sock puppetry">by one individual or group of people</a>, and to protect Wikipedia against disruptive or abusive behaviour. </p><p>Checkusers are able to view a list of all IP addresses used by a user account to edit the English Wikipedia, a list of all edits made <i>by</i> or <i>from</i> an IP address or range (which includes edits by accounts while on the IP address or range), or a list of all user accounts that have used an IP address or range. They may also view a log of CheckUser actions at <a href="/wiki/Special:CheckUserLog" title="Special:CheckUserLog">Special:CheckUserLog</a>. </p><p>CheckUser data is never accessed or released except in accordance with the <a href="/wiki/Wikimedia_Foundation" title="Wikimedia Foundation">Wikimedia Foundation</a>'s (WMF) <a href="https://foundation.wikimedia.org/wiki/Privacy_policy" class="extiw" title="wmf:Privacy policy">privacy policy</a> and the additional restrictions placed by this policy. After completing an investigation with the CheckUser tool, most checkusers release their findings in generalised form (such as with a statement that "account A is, is not, or may be the same as accounts B or C"); on the English Wikipedia, the release of actual private data (like "account D is connecting through IP address 0.1.2.3") is exceptionally rare. Conclusions derived from CheckUser data have limited usefulness, and a negative finding by a checkuser <a href="/wiki/Wikipedia:The_duck_test" title="Wikipedia:The duck test">rarely precludes</a> obvious sockpuppetry. </p><p>On the English Wikipedia, CheckUser access is entrusted to <a href="/wiki/Special:ListUsers/checkuser" title="Special:ListUsers/checkuser">a restricted number of trusted users</a> who can execute CheckUser inquiries at their own discretion. The permission is granted by Wikipedia's <a href="/wiki/Wikipedia:Arbitration_Committee" title="Wikipedia:Arbitration Committee">Arbitration Committee</a>, after community consultation and vetting of the editor by the committee's members and the <a href="/wiki/Wikipedia:FUNCT" class="mw-redirect" title="Wikipedia:FUNCT">functionary team</a>. While there is no formal requirement that checkusers also be administrators, the Arbitration Committee has traditionally restricted applications to users who are currently administrators. Checkusers must be 18 years of age or older and have <a href="/wiki/Wikipedia:Access_to_nonpublic_information" title="Wikipedia:Access to nonpublic information">signed the Wikimedia Foundation's confidentiality agreement for nonpublic information</a> before being appointed. The use of the CheckUser tool on the English Wikipedia is monitored and controlled by the Arbitration Committee, and checkusers may have their permissions revoked by the Arbitration Committee for misuse or abuse of the tool. </p><p>This policy supplements the <a href="https://meta.wikimedia.org/wiki/CheckUser" class="extiw" title="m:CheckUser">global checkuser policy</a> and applies only to the English Wikipedia. </p> <meta property="mw:PageProp/toc"/> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Policy" data-mw-thread-id="h-Policy"><span data-mw-comment-start="" id="h-Policy"></span>Policy<span data-mw-comment-end="h-Policy"></span></h2></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="https://meta.wikimedia.org/wiki/CheckUser_policy" class="extiw" title="m:CheckUser policy">m:CheckUser policy</a></div> <p>The CheckUser tool may be used only to prevent disruptive editing on the English Wikipedia or to investigate legitimate, credible concerns of bad-faith editing or <a href="/wiki/Wikipedia:Sock_puppetry" class="mw-redirect" title="Wikipedia:Sock puppetry">sockpuppetry</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Grounds_for_checking" data-mw-thread-id="h-Grounds_for_checking-Policy"><span data-mw-comment-start="" id="h-Grounds_for_checking-Policy"></span>Grounds for checking<span data-mw-comment-end="h-Grounds_for_checking-Policy"></span></h3></div> <p>CheckUser data may be used to investigate, prevent, or respond to: </p> <ol><li><a href="/wiki/Wikipedia:Vandalism" title="Wikipedia:Vandalism">Vandalism</a>;</li> <li>Sockpuppetry;</li> <li>Disruption (or potential disruption) of any Wikimedia project; and</li> <li>Legitimate concerns about bad-faith editing.</li></ol> <p>The tool may never be used to: </p> <ol><li>Exert political or social control;</li> <li>Apply pressure on an editor; or</li> <li>Threaten another editor into compliance in a content dispute.</li></ol> <p>The primary purpose of CheckUser is the prevention of sockpuppetry, but community policy provides for several <a href="/wiki/Wikipedia:Sock_puppetry#Legitimate_uses_of_alternative_accounts" class="mw-redirect" title="Wikipedia:Sock puppetry">legitimate uses of alternative accounts</a> where the alternative accounts are not being used to violate site policy (such as by double voting or by giving the impression there is more support for a position in a discussion or content dispute). </p> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1252059228"><div class="module-shortcutanchordiv"><span id="WP:CHECKME"></span></div><div class="module-shortcutboxplain noprint" role="note"><div class="module-shortcutlist"><a href="/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a></div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span class="plainlinks"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Wikipedia:CHECKME&redirect=no">WP:CHECKME</a></span></li></ul></div></div> <p>On some Wikimedia projects, an editor's IP addresses may be checked upon their request, typically to prove innocence against a sockpuppet allegation. Such checks are not allowed on the English Wikipedia and such requests will not be granted. </p> <div class="mw-heading mw-heading3"><h3 id="Notifying_the_account_that_is_checked" data-mw-thread-id="h-Notifying_the_account_that_is_checked-Policy"><span data-mw-comment-start="" id="h-Notifying_the_account_that_is_checked-Policy"></span>Notifying the account that is checked<span data-mw-comment-end="h-Notifying_the_account_that_is_checked-Policy"></span></h3></div> <p>Checkusers are permitted, but not required, to inform an editor that their account has been checked. The result of a check may be disclosed to the community (on a community process page like <a href="/wiki/Wikipedia:Sockpuppet_investigations" title="Wikipedia:Sockpuppet investigations">Wikipedia:Sockpuppet investigations</a>). </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="CheckUser_and_the_privacy_policy" data-mw-thread-id="h-CheckUser_and_the_privacy_policy"><span data-mw-comment-start="" id="h-CheckUser_and_the_privacy_policy"></span>CheckUser and the privacy policy<span data-mw-comment-end="h-CheckUser_and_the_privacy_policy"></span></h2></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1252059228"><div class="module-shortcutanchordiv"><span id="WP:CUPRIVACY"></span></div><div class="module-shortcutboxplain noprint" role="note"><div class="module-shortcutlist"><a href="/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a></div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span class="plainlinks"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Wikipedia:CUPRIVACY&redirect=no">WP:CUPRIVACY</a></span></li></ul></div></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="https://meta.wikimedia.org/wiki/Privacy_policy" class="extiw" title="m:Privacy policy">m:Privacy policy</a></div> <p>The CheckUser feature facilitates access to non-public information. The Wikimedia Foundation takes the privacy of its users extremely seriously, and there may at times be tension between protecting Wikipedia from damage and disruption, and protecting the privacy of users (even disruptive ones). Checkusers must perpetually weigh these opposing concerns. In order to reach the optimal result, checkusers on the English Wikipedia are required to adhere to the following conventions and practices: </p> <ol><li>Checkusers are given discretion to check an account, but must always do so for legitimate purposes. Broadly, checks must be made only in order to prevent or reduce potential or actual disruption, or to investigate credible, legitimate concerns of bad faith editing.</li> <li>Checkusers often receive requests from non-checkusers that they check an account (though many checks are also initiated by the checkuser without direction, for instance because the checkuser has noticed a suspicious account). Where a check is initiated as a result of a request from a non-checkuser, that request may be received in public or in private. Requests received privately may be directed by the checkuser to be made publicly if the checkuser so desires, and vice versa.</li> <li>Unsubstantiated requests will be declined and a check will not be run (typically using the slogan "CheckUser is not for fishing"). On their own cognisance, checkusers may nonetheless privately make any check that falls within the bounds of CheckUser policy; this might include a check that they have elsewhere or earlier declined to make.</li> <li>The disclosure of actual CheckUser data (such as IP addresses) is subject to the <a href="https://foundation.wikimedia.org/wiki/Privacy_Policy" class="extiw" title="wmf:Privacy Policy">privacy policy</a>, which requires that identifying information not be disclosed except under the following circumstances: <dl><dd><ul><li>With the permission of the affected user;</li> <li>Where the user has been vandalising articles or persistently behaving in a disruptive way, data may be released to non-checkusers to allow the making of IP blocks or rangeblocks, or to assist in the formulation of a complaint to relevant Internet Service Providers or network operators; and</li> <li>Where it could reasonably be thought necessary to protect the rights, property or safety of the Wikimedia Foundation, its users or the public.</li></ul></dd></dl></li></ol> <p>These conventions arise out of practice that has emerged in the years since the checkuser tool was created, and in some cases out of rulings or "statements of best practice" by the <a href="/wiki/Wikipedia:AUSC" class="mw-redirect" title="Wikipedia:AUSC">Audit Subcommittee</a> (now disbanded) and the Arbitration Committee. </p> <div class="mw-heading mw-heading3"><h3 id="IP_information_disclosure" data-mw-thread-id="h-IP_information_disclosure-CheckUser_and_the_privacy_policy"><span data-mw-comment-start="" id="h-IP_information_disclosure-CheckUser_and_the_privacy_policy"></span>IP information disclosure<span data-mw-comment-end="h-IP_information_disclosure-CheckUser_and_the_privacy_policy"></span></h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1252059228"><div class="module-shortcutanchordiv"><span id="WP:CUIPDISCLOSE"></span></div><div class="module-shortcutboxplain noprint" role="note"><div class="module-shortcutlist"><a href="/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a></div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span class="plainlinks"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Wikipedia:CUIPDISCLOSE&redirect=no">WP:CUIPDISCLOSE</a></span></li></ul></div></div> <p>Checkusers may state that different named accounts are operated from the same IP or range, so long as the actual IP address(es) are not specified, or if only non-specific details are given (such as the name of the country, region, or large ISP associated with the IP address). If the checkuser's statement could not lead to another person divining the personal identity of the user accounts in question, such disclosure would be permissible. However, on the English Wikipedia, checkusers are discouraged from making a public statement that connects one or more IP addresses to one or more named accounts, since an IP address is often much more tightly linked to a specific person. (In the case of larger IP ranges, this discouragement is not as great because larger ranges mean a less specific connection can be drawn.) When announcing the results of their checks, checkusers will employ a variety of means to avoid connecting a user to an IP address, but in some cases it is hard to avoid doing so. This policy encourages English Wikipedia checkusers not to allow such connections to be made from their results, but the global privacy policy allows them to do so in the case of serious disruption, and this policy allows checkusers to prioritise compliance with Wikipedia policy over the personal privacy of a user who has abusively edited the encyclopedia. </p><p>In some situations, while checkusers can endeavour to avoid explicitly connecting an account to an IP address, they will find it difficult or impossible not to do so. For instance, when a user edits disruptively using multiple IPs, or a mixture of IPs and accounts, the checkuser will find it difficult to block the accounts and then the IP addresses without an obvious inference being drawn by onlookers from the series of blocks being made in a short period of time. When a user abusively uses several accounts and it is reasonably plausible they will create more accounts, the underlying IP range must be blocked so further abusive accounts cannot be made. The IP addresses and user accounts must therefore be blocked together. </p><p>Users who engage in problematic conduct to the point that requests for administrative action or blocking are raised and considered valid for CheckUser usage—and where a checkuser then determines the user probably has engaged in such conduct—must expect the protection of the project to be given a higher priority than the protection of those who knowingly breach its policies. </p> <div class="mw-heading mw-heading3"><h3 id="IP_information_retention" data-mw-thread-id="h-IP_information_retention-CheckUser_and_the_privacy_policy"><span data-mw-comment-start="" id="h-IP_information_retention-CheckUser_and_the_privacy_policy"></span>IP information retention<span data-mw-comment-end="h-IP_information_retention-CheckUser_and_the_privacy_policy"></span></h3></div> <p>Information about users (like their IP address) is retained for a limited period on Wikimedia Foundation sites. Data retention is limited in this way because incidents or actions that are not current rarely require investigation. </p> <div class="mw-heading mw-heading3"><h3 id="Guidance_given_to_checkusers" data-mw-thread-id="h-Guidance_given_to_checkusers-CheckUser_and_the_privacy_policy"><span data-mw-comment-start="" id="h-Guidance_given_to_checkusers-CheckUser_and_the_privacy_policy"></span>Guidance given to checkusers<span data-mw-comment-end="h-Guidance_given_to_checkusers-CheckUser_and_the_privacy_policy"></span></h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1252059228"><div class="module-shortcutanchordiv"><span id="WP:MAGIC8BALL"></span></div><div class="module-shortcutboxplain noprint" role="note"><div class="module-shortcutlist"><a href="/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a></div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span class="plainlinks"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Wikipedia:MAGIC8BALL&redirect=no">WP:MAGIC8BALL</a></span></li></ul></div></div> <p><a href="https://meta.wikimedia.org/wiki/CheckUser_policy" class="extiw" title="m:CheckUser policy">m:CheckUser policy</a> advises that even if the user is committing abuse, personal information should if possible not be revealed. Checkusers are advised as follows: </p> <ul><li>Generally, don't reveal IP addresses when announcing their results. Only give generalized results, such as that one account uses the same network (or a different network) to another account. If detailed information is provided, make sure the person you are giving it to is a trusted person who will not reveal it. Typically, such information should not be given to people who are not functionaries or experienced administrators; it would be best to deal with the abusive accounts with other checkusers.</li> <li>If the user has said they're from a certain region and their IP address confirms that, you are permitted to declare that CheckUser verifies they are.</li> <li>If you're in any doubt, give no detail – and "answer like a <a href="/wiki/Magic_8-Ball" class="mw-redirect" title="Magic 8-Ball">Magic 8-Ball</a>"!</li></ul> <p>On the English Wikipedia, checkusers asked to run a check must have clear evidence that a check is appropriate and necessary. The onus is on an individual checkuser to explain, if challenged, why a check was run. The CheckUser log is regularly examined by arbitrators. All actions associated with the CheckUser tool, especially public or off-wiki actions, are subject to public view and can result in a complaint being filed with the Arbitration Committee, the <a href="https://meta.wikimedia.org/wiki/Ombuds_commission" class="extiw" title="meta:Ombuds commission">Wikimedia Foundation Ombuds Commission</a>, or both. Checkusers who run checks based on an unsubstantiated accusation may be cautioned or subject to sanctions, up to and including the revocation of their permissions; for a previous example of this, see <a href="/wiki/Wikipedia:Arbitration_Committee/Noticeboard/Archive_5#Raul654" title="Wikipedia:Arbitration Committee/Noticeboard/Archive 5">this 2009 investigation</a> by the Audit Subcommittee. </p> <div class="mw-heading mw-heading3"><h3 id="Fishing" data-mw-thread-id="h-Fishing-CheckUser_and_the_privacy_policy"><span data-mw-comment-start="" id="h-Fishing-CheckUser_and_the_privacy_policy"></span><span id=".22Fishing.22"></span>Fishing<span data-mw-comment-end="h-Fishing-CheckUser_and_the_privacy_policy"></span></h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1252059228"><div class="module-shortcutanchordiv"><span id="WP:NOTFISHING"></span></div><div class="module-shortcutboxplain noprint" role="note"><div class="module-shortcutlist"><a href="/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a></div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span class="plainlinks"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Wikipedia:NOTFISHING&redirect=no">WP:NOTFISHING</a></span></li></ul></div></div> <p>"Fishing" is to check an account where there is no credible evidence to suspect sockpuppetry. Checks are inappropriate unless there is evidence suggesting abusive sockpuppetry. For example, it is not fishing to check an account where the alleged sockmaster is unknown, but there is reasonable suspicion of sockpuppetry, and a suspected sockpuppet's operator is sometimes unknown until a CheckUser investigation is concluded. Checks with a negative result do not mean the check was initially invalid. </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Contacting_a_checkuser" data-mw-thread-id="h-Contacting_a_checkuser"><span data-mw-comment-start="" id="h-Contacting_a_checkuser"></span>Contacting a checkuser<span data-mw-comment-end="h-Contacting_a_checkuser"></span></h2></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1252059228"><div class="module-shortcutanchordiv"><span id="WP:CONTACTCU"></span></div><div class="module-shortcutboxplain noprint" role="note"><div class="module-shortcutlist"><a href="/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a></div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span class="plainlinks"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Wikipedia:CONTACTCU&redirect=no">WP:CONTACTCU</a></span></li></ul></div></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main pages: <a href="/wiki/Wikipedia:Functionaries" title="Wikipedia:Functionaries">Wikipedia:Functionaries</a> and <a href="/wiki/Wikipedia:Sockpuppet_investigations" title="Wikipedia:Sockpuppet investigations">Wikipedia:Sockpuppet investigations</a></div> <p>Checkusers are seasoned, experienced users, who are thoroughly vetted and highly trusted to handle sensitive and private matters, as well as other user issues. Routine <a href="/wiki/Wikipedia:SOCK" class="mw-redirect" title="Wikipedia:SOCK">sockpuppet</a> and editing issues requiring checkuser review are handled at <a href="/wiki/Wikipedia:Sockpuppet_investigations" title="Wikipedia:Sockpuppet investigations">Wikipedia:Sockpuppet investigations</a>. In keeping with <a href="/wiki/Wikipedia:NOTBUREAUCRACY" class="mw-redirect" title="Wikipedia:NOTBUREAUCRACY">WP:NOTBUREAUCRACY</a>, checkusers are authorized to receive contact by other means, like on their user talk pages, by email, on IRC or a mailing list, and so on. If an incident is of a private or sensitive nature, you should never use public means of contact. If an incident is of an urgent nature, you should contact a checkuser you know to be online, or contact multiple active CheckUsers. If an incident is an emergency, you should contact the Wikimedia Foundation. If you require an editor with checkuser access, you may contact: </p> <ol><li><b>An individual checkuser</b> who will either advise, deal with the matter, or (especially if asked) forward it on to other checkusers for wider discussion. <a class="external text" href="https://en.wikipedia.org/w/index.php?title=Special:ActiveUsers&groups=checkuser&wpFormIdentifier=specialactiveusers">A list of recently active checkusers</a> is available.</li> <li><b>The English Wikipedia checkuser team</b>, which can be suitable if you need other checkusers to be aware or you do not know any checkusers personally to judge which individual to contact. You may do so by emailing the English Wikipedia checkuser <a href="/wiki/Wikipedia:VRT" class="mw-redirect" title="Wikipedia:VRT">VRT</a> queue at <span class="nowrap">checkuser-en-wp<span class="mw-no-invert"><span class="skin-invert" typeof="mw:File"><span title="@"><img alt="@" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/88/At_sign.svg/15px-At_sign.svg.png" decoding="async" width="15" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/88/At_sign.svg/23px-At_sign.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/88/At_sign.svg/30px-At_sign.svg.png 2x" data-file-width="145" data-file-height="145"/></span></span></span>wikipedia.org</span>. Not all checkusers are subscribed to this list. If it is sensitive beyond that, then it may instead be sent to the <a href="/wiki/Wikipedia:AC" class="mw-redirect" title="Wikipedia:AC">Arbitration Committee mailing list</a> or any arbitrator.</li> <li><b>The interwiki checkuser team</b>, which co-ordinates between checkusers on all WMF projects (and stewards, for small wikis with no local checkusers) in the checkuser-l mailing list. The inter-project team is ideal for matters concerning prolific vandals or sock users, privacy-related incidents or harassment, and other global matters of interest beyond English Wikipedia. The Wikimedia-wide checkuser mailing list does not receive mail from non-subscribers, so you will need to contact a checkuser by other means (like IRC).</li></ol> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="CheckUser_operation" data-mw-thread-id="h-CheckUser_operation"><span data-mw-comment-start="" id="h-CheckUser_operation"></span>CheckUser operation<span data-mw-comment-end="h-CheckUser_operation"></span></h2></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:CheckUser1.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/CheckUser1.png/330px-CheckUser1.png" decoding="async" width="330" height="245" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/CheckUser1.png/495px-CheckUser1.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3e/CheckUser1.png/660px-CheckUser1.png 2x" data-file-width="980" data-file-height="727"/></a><figcaption>A screenshot of the CheckUser form with the Vector skin.</figcaption></figure> <div class="mw-heading mw-heading3"><h3 id="Usage" data-mw-thread-id="h-Usage-CheckUser_operation"><span data-mw-comment-start="" id="h-Usage-CheckUser_operation"></span>Usage<span data-mw-comment-end="h-Usage-CheckUser_operation"></span></h3></div> <p>A user with CheckUser access will get an extra "CheckUser" option under <a href="/wiki/Special:SpecialPages" title="Special:SpecialPages">Special:SpecialPages</a>, "check IP addresses" and "recent user checks" options on <a href="/wiki/Special:Contributions" title="Special:Contributions">Special:Contributions</a>, and access to the <a href="/wiki/Special:CheckUser" title="Special:CheckUser">Special:CheckUser</a> and <a href="/wiki/Special:CheckUserLog" title="Special:CheckUserLog">Special:CheckUserLog</a> special pages, along with other similar functions. On the English Wikipedia, checkusers also receive access to the checkuser-l global mailing list, are subscribed to the <a href="/wiki/Wikipedia:Functionaries" title="Wikipedia:Functionaries">functionaries-l</a> mailing list, and receive access to the private IRC channels at their request. </p><p>Several scripts exist for English Wikipedia checkusers, including <a href="/wiki/User:Amalthea/culoghelper.js" title="User:Amalthea/culoghelper.js">User:Amalthea/culoghelper.js</a>, <i>User:Amalthea/cufilter</i>, <a href="/wiki/MediaWiki:Gadget-markblocked.js" title="MediaWiki:Gadget-markblocked.js">MediaWiki:Gadget-markblocked.js</a>, and <a href="/wiki/User:GeneralNotability/spihelper.js" title="User:GeneralNotability/spihelper.js">User:GeneralNotability/spihelper.js</a>, among others.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>note 1<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Guide_to_checkusers" data-mw-thread-id="h-Guide_to_checkusers-CheckUser_operation"><span data-mw-comment-start="" id="h-Guide_to_checkusers-CheckUser_operation"></span>Guide to checkusers<span data-mw-comment-end="h-Guide_to_checkusers-CheckUser_operation"></span></h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1252059228"><div class="module-shortcutanchordiv"><span id="WP:PIXIEDUST"></span></div><div class="module-shortcutboxplain noprint" role="note"><div class="module-shortcutlist"><a href="/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a></div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span class="plainlinks"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Wikipedia:PIXIEDUST&redirect=no">WP:PIXIEDUST</a></span></li></ul></div></div> <p>The <a href="https://meta.wikimedia.org/wiki/Help:CheckUser" class="extiw" title="m:Help:CheckUser">Meta checkuser help page</a> gives checkusers the following information: </p> <ul><li>CheckUser is a technical tool, and requires a significant degree of familiarity with IPs, IP ranges, and related principles, to be correctly used.</li> <li>CheckUser is not magic wiki <a href="https://en.wiktionary.org/wiki/pixie_dust" class="extiw" title="wikt:pixie dust">pixie dust</a>. Almost all queries about IPs will be because two editors were behaving the same way or an editor was behaving in a way that suggests disruption. An editing pattern match is the important thing; the IP match is really just extra evidence (or not).</li> <li>Most dialup and many DSL and cable IP addresses are dynamic, meaning they might change every session, every day, every week, every few months, or hardly ever. Unless the access times are immediately before and after each other, be cautious in declaring a match based on IP address alone. Experienced check users will learn to recognise if an ISP changes frequently or occasionally. Proxy IP addresses might not be a match, depending on the size of the organisation running the proxy (per whois output). If it's an ISP proxy, it is not so likely to indicate a match. (Note – some users, particularly those involved in technical matters, can help identify whether an IP is likely to be a proxy, or is likely to be static, fast, or slow changing.)</li> <li>There is both a checkuser mailing list (<span class="nowrap">checkuser-l<span class="mw-no-invert"><span class="skin-invert" typeof="mw:File"><span title="@"><img alt="@" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/88/At_sign.svg/15px-At_sign.svg.png" decoding="async" width="15" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/88/At_sign.svg/23px-At_sign.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/88/At_sign.svg/30px-At_sign.svg.png 2x" data-file-width="145" data-file-height="145"/></span></span></span>lists.wikimedia.org</span>), and a checkuser <a href="/wiki/Wikipedia:IRC" title="Wikipedia:IRC">irc</a> channel (<code><a href="irc://irc.libera.chat/wikimedia-checkuser" class="extiw" title="irc:wikimedia-checkuser">#wikimedia-checkuser</a></code>), providing means to consult and get advice on checks and their interpretation, especially in the case of more complex vandalism. Both are used by checkusers on all Wikimedia Foundation projects; they are not just for the <a href="/wiki/English_Wikipedia" title="English Wikipedia">English Wikipedia</a>. Access to the IRC channel is by invitation only and the checkuser mailing list does not accept correspondence from non-members – users seeking assistance of a local checkuser should see the <a href="#Contacting_a_checkuser">§ Contacting a checkuser</a> above. Checkusers also have access to a private wiki where they can share data with other members of the global checkuser team. It can also be used to store historical CheckUser data, typically in cases of long-term or complex sockpuppetry. <ul><li>Checkusers also have access to the channel <code><a href="irc://irc.libera.chat/wikimedia-privacy" class="extiw" title="irc:wikimedia-privacy">#wikimedia-privacy</a></code>, as do <a href="/wiki/Wikipedia:OS" class="mw-redirect" title="Wikipedia:OS">oversighters</a>.</li></ul></li> <li>Checkusers who are executing a CheckUser query should remember that anonymity tools can spoof headers, including the useragent, which may make it appear that a good-faith editor with <a href="/wiki/Wikipedia:IPBE" class="mw-redirect" title="Wikipedia:IPBE">IPBE</a> is actually a sock of a disruptive editor.</li></ul> <div class="mw-heading mw-heading3"><h3 id="Reasons_and_communication" data-mw-thread-id="h-Reasons_and_communication-CheckUser_operation"><span data-mw-comment-start="" id="h-Reasons_and_communication-CheckUser_operation"></span>Reasons and communication<span data-mw-comment-end="h-Reasons_and_communication-CheckUser_operation"></span></h3></div> <p>Checkusers must be able to provide a valid reason to another checkuser (or the Arbitration Committee) for all checks they conduct. </p><p>Checkusers should clearly mark as a "checkuser block" any block based on findings that involve checkuser data. The templates <span class="nowrap">{{</span><a href="/wiki/Template:Checkuserblock" class="mw-redirect" title="Template:Checkuserblock">checkuserblock</a><span class="nowrap">}}</span>, <span class="nowrap">{{</span><a href="/wiki/Template:Checkuserblock-wide" title="Template:Checkuserblock-wide">checkuserblock-wide</a><span class="nowrap">}}</span> and <span class="nowrap">{{</span><a href="/wiki/Template:Checkuserblock-account" title="Template:Checkuserblock-account">checkuserblock-account</a><span class="nowrap">}}</span> may be used for this purpose. However, in the case of such blocks, checkusers are not required to explain to non-checkusers the specific evidence at play (and are prohibited from doing so by the privacy policy). </p> <div class="mw-heading mw-heading3"><h3 id="CheckUser_blocks" data-mw-thread-id="h-CheckUser_blocks-CheckUser_operation"><span data-mw-comment-start="" id="h-CheckUser_blocks-CheckUser_operation"></span>CheckUser blocks<span data-mw-comment-end="h-CheckUser_blocks-CheckUser_operation"></span></h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Wikipedia:Blocking_policy#CheckUser_blocks" title="Wikipedia:Blocking policy">Wikipedia:Blocking policy § CheckUser blocks</a></div> <p>Checkusers can block accounts based on technical (checkuser) evidence. They will make clear in the block log summary that they have blocked as a "checkuser action", usually by including the <span class="nowrap">{{</span><a href="/wiki/Template:Checkuserblock" class="mw-redirect" title="Template:Checkuserblock">checkuserblock</a><span class="nowrap">}}</span>, <span class="nowrap">{{</span><a href="/wiki/Template:Checkuserblock-account" title="Template:Checkuserblock-account">checkuserblock-account</a><span class="nowrap">}}</span>, or similar templates. These blocks must not be reversed by non-checkusers. Administrators must not undo nor loosen any block that is specifically called a "checkuser block" without first consulting a checkuser or the <a href="/wiki/Wikipedia:Arbitration_Committee" title="Wikipedia:Arbitration Committee">Arbitration Committee</a>.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>note 2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>note 3<span class="cite-bracket">]</span></a></sup> However, all checkuser blocks are subject to direct review and significant scrutiny by the other checkusers and the Arbitration Committee. Users whose block log summary indicates a checkuser action may appeal the block, and are expected to do so on-wiki using the <span class="nowrap">{{</span><a href="/wiki/Template:Unblock" title="Template:Unblock">unblock</a><span class="nowrap">}}</span> template. </p> <div class="mw-heading mw-heading3"><h3 id="Log_of_checks" data-mw-thread-id="h-Log_of_checks-CheckUser_operation"><span data-mw-comment-start="" id="h-Log_of_checks-CheckUser_operation"></span><span class="anchor" id="Logging"></span> Log of checks<span data-mw-comment-end="h-Log_of_checks-CheckUser_operation"></span></h3></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:CheckUser_log.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/CheckUser_log.png/330px-CheckUser_log.png" decoding="async" width="330" height="181" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/CheckUser_log.png/495px-CheckUser_log.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a2/CheckUser_log.png/660px-CheckUser_log.png 2x" data-file-width="1421" data-file-height="780"/></a><figcaption>Example CheckUser log</figcaption></figure> <p>CheckUser queries cannot be executed on the English Wikipedia without the initiator entering something into the "Reason for check" field, which is akin to the <a href="/wiki/Wikipedia:Edit_summary" class="mw-redirect" title="Wikipedia:Edit summary">edit summary</a> feature for page-editing. All queries are logged at <a href="/wiki/Special:CheckUserLog" title="Special:CheckUserLog">Special:CheckUserLog</a>, which is visible to other checkusers through <a href="/wiki/Special:CheckUser" title="Special:CheckUser">Special:CheckUser</a>. Each entry in the log will show who ran the check, when, the check reason, and what type of data was called (the tool can be used to get IPs, edits from an IP, or users for an IP). The log does <i>not</i> display, nor allow for the retention of, data returned from a check. </p> <div class="mw-heading mw-heading3"><h3 id="Assignment_and_revocation" data-mw-thread-id="h-Assignment_and_revocation-CheckUser_operation"><span data-mw-comment-start="" id="h-Assignment_and_revocation-CheckUser_operation"></span>Assignment and revocation<span data-mw-comment-end="h-Assignment_and_revocation-CheckUser_operation"></span></h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main page: <a href="/wiki/Wikipedia:Arbitration_Committee/CheckUser_and_Oversight" title="Wikipedia:Arbitration Committee/CheckUser and Oversight">Wikipedia:Arbitration Committee/CheckUser and Oversight</a></div> <p>Checkuser permissions are assigned by the <a href="/wiki/Wikipedia:Arbitration_Committee" title="Wikipedia:Arbitration Committee">Arbitration Committee</a>. While many users with checkuser permissions are or were members of the Arbitration Committee, the Arbitration Committee also appoints a number of editors as checkusers, typically around once a year. Users interested in obtaining access should add the <a href="/wiki/Wikipedia:AC/N" class="mw-redirect" title="Wikipedia:AC/N">ArbCom noticeboard</a> to their watchlists for an announcement or should contact the Committee. Appointments that are confirmed by the Arbitration Committee will be posted on <a href="https://meta.wikimedia.org/wiki/Requests_for_permissions#CheckUser_access" class="extiw" title="m:Requests for permissions">Requests for permissions</a> on Meta-Wiki; a steward will assign the permission once the user has completed and signed the necessary <a href="/wiki/Wikipedia:IDENT" class="mw-redirect" title="Wikipedia:IDENT">non-public information confidentiality document</a>. </p><p>Checkuser permissions can be revoked for not meeting the <a href="/wiki/Wikipedia:Arbitration_Committee/Procedures#CheckUser/Oversight_permissions_and_inactivity" title="Wikipedia:Arbitration Committee/Procedures">minimum activity level</a> or for cause. If the Committee feels that an editor has abused CheckUser, such as by inappropriately performing checks or needlessly disclosing privacy related information from a CheckUser inquiry, they will request a <a href="https://meta.wikimedia.org/wiki/Stewards" class="extiw" title="m:Stewards">Steward</a> to remove the permission from the editor. This may be done by any of the usual ways, including e-mail or a request on <a href="https://meta.wikimedia.org/wiki/Requests_for_permission#CheckUser_rights_for_English_Wikipedia" class="extiw" title="m:Requests for permission">requests for permission</a> on Meta. Emergency requests based upon clear evidence may also be made in exceptional circumstances, the same way. In an exceptional case, <i>and for good cause</i>, a steward may temporarily remove the permission, pending a decision by the Committee. The steward should check that the matter is well-founded, and make clear immediately that it is a temporary response only, since such an action could lead to controversy. </p> <div class="mw-heading mw-heading3"><h3 id="Complaints_and_misuse" data-mw-thread-id="h-Complaints_and_misuse-CheckUser_operation"><span data-mw-comment-start="" id="h-Complaints_and_misuse-CheckUser_operation"></span>Complaints and misuse<span data-mw-comment-end="h-Complaints_and_misuse-CheckUser_operation"></span></h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="https://meta.wikimedia.org/wiki/CheckUser_policy#Removal_of_access" class="extiw" title="m:CheckUser policy">m:CheckUser policy § Removal of access</a></div> <p>The Wikimedia Foundation policy on revocation of CheckUser access states in part that: </p> <style data-mw-deduplicate="TemplateStyles:r1244412712">.mw-parser-output .templatequote{overflow:hidden;margin:1em 0;padding:0 32px}.mw-parser-output .templatequotecite{line-height:1.5em;text-align:left;margin-top:0}@media(min-width:500px){.mw-parser-output .templatequotecite{padding-left:1.6em}}</style><blockquote class="templatequote"><p>Any user account with CheckUser status that is inactive for more than one year will have their CheckUser access removed.</p><p>In case of abusive use of the tool, the Steward or the editor with the CheckUser privilege will immediately have their access removed. This will in particular happen if checks are done routinely on editors without a serious motive to do so (links and proofs of bad behavior should be provided).</p><p>Suspicion of abuses of CheckUser should be discussed by each local wiki. On wikis with an approved ArbCom, the ArbCom can decide on the removal of access [...]</p><p>Complaints of infringement of CheckUser, Access to Nonpublic Information Policy or Privacy Policy breaches are handled by the <a href="https://meta.wikimedia.org/wiki/Ombuds_commission" class="extiw" title="m:Ombuds commission">Ombuds commission</a> for all Wikimedia projects.</p></blockquote> <p>Complaints involving the release of personally identifying information or other potential violations of the WMF's Privacy Policy should be made to the <a href="https://meta.wikimedia.org/wiki/Ombuds_commission" class="extiw" title="m:Ombuds commission">Ombuds commission</a>. </p><p>Other complaints or inquiries about potential misuse of the checkuser tool should be referred to the <a href="/wiki/Wikipedia:Arbitration_Committee/Audit" title="Wikipedia:Arbitration Committee/Audit">Arbitration Committee</a>. </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Users_with_checkuser_permissions" data-mw-thread-id="h-Users_with_checkuser_permissions"><span data-mw-comment-start="" id="h-Users_with_checkuser_permissions"></span>Users with checkuser permissions<span data-mw-comment-end="h-Users_with_checkuser_permissions"></span></h2></div> <p>There are currently 55 users with the CheckUser permission on the English Wikipedia. A complete listing is available at <a href="/wiki/Special:ListUsers/checkuser" title="Special:ListUsers/checkuser">Special:Listusers/checkuser</a>. As of 15 November 2024, the following editors form the CheckUser team on the English Wikipedia: </p> <dl><dt><a href="/wiki/Wikipedia:Arbitration_Committee/CheckUser_and_Oversight" title="Wikipedia:Arbitration Committee/CheckUser and Oversight">Appointed</a> community checkusers</dt> <dd><a href="/wiki/User:Alison" title="User:Alison">Alison</a>, <a href="/wiki/User:Blablubbs" title="User:Blablubbs">Blablubbs</a>, <a href="/wiki/User:DatGuy" title="User:DatGuy">DatGuy</a>, <a href="/wiki/User:Dreamy_Jazz" title="User:Dreamy Jazz">Dreamy Jazz</a>, <a href="/wiki/User:EdJohnston" title="User:EdJohnston">EdJohnston</a>, <a href="/wiki/User:Ferret" title="User:Ferret">Ferret</a>, <a href="/wiki/User:Girth_Summit" title="User:Girth Summit">Girth Summit</a>, <a href="/wiki/User:Ivanvector" title="User:Ivanvector">Ivanvector</a>, <a href="/wiki/User:Materialscientist" title="User:Materialscientist">Materialscientist</a>, <a href="/wiki/User:Mz7" title="User:Mz7">Mz7</a>, <a href="/wiki/User:NinjaRobotPirate" title="User:NinjaRobotPirate">NinjaRobotPirate</a>, <a href="/wiki/User:Oshwah" title="User:Oshwah">Oshwah</a>, <a href="/wiki/User:Ponyo" title="User:Ponyo">Ponyo</a>, <a href="/wiki/User:Reaper_Eternal" title="User:Reaper Eternal">Reaper Eternal</a>, <a href="/wiki/User:RoySmith" title="User:RoySmith">RoySmith</a>, <a href="/wiki/User:Spicy" title="User:Spicy">Spicy</a>, <a href="/wiki/User:SQL" title="User:SQL">SQL</a>, <a href="/wiki/User:ST47" title="User:ST47">ST47</a>, <a href="/wiki/User:Stwalkerster" title="User:Stwalkerster">Stwalkerster</a>, <a href="/wiki/User:TheresNoTime" title="User:TheresNoTime">TheresNoTime</a>, <a href="/wiki/User:Vanamonde93" title="User:Vanamonde93">Vanamonde93</a>, <a href="/wiki/User:Versageek" title="User:Versageek">Versageek</a>, <a href="/wiki/User:Yamla" title="User:Yamla">Yamla</a>, <a href="/wiki/User:Zzuuzz" title="User:Zzuuzz">Zzuuzz</a></dd> <dt>Current arbitrators</dt> <dd><a href="/wiki/User:Aoidh" title="User:Aoidh">Aoidh</a>, <a href="/wiki/User:Cabayi" title="User:Cabayi">Cabayi</a>, <a href="/wiki/User:CaptainEek" title="User:CaptainEek">CaptainEek</a>, <a href="/wiki/User:Firefly" title="User:Firefly">Firefly</a>,<sup id="cite_ref-prior_4-0" class="reference"><a href="#cite_note-prior-4"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> <a href="/wiki/User:Guerillero" title="User:Guerillero">Guerillero</a>,<sup id="cite_ref-prior_4-1" class="reference"><a href="#cite_note-prior-4"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> <a href="/wiki/User:HJ_Mitchell" title="User:HJ Mitchell">HJ Mitchell</a>, <a href="/wiki/User:L235" title="User:L235">L235</a>,<sup id="cite_ref-prior_4-2" class="reference"><a href="#cite_note-prior-4"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> <a href="/wiki/User:Moneytrees" title="User:Moneytrees">Moneytrees</a>, <a href="/wiki/User:Primefac" title="User:Primefac">Primefac</a>, <a href="/wiki/User:Sdrqaz" title="User:Sdrqaz">Sdrqaz</a>, <a href="/wiki/User:ToBeFree" title="User:ToBeFree">ToBeFree</a>, <a href="/wiki/User:Z1720" title="User:Z1720">Z1720</a></dd> <dt>Former arbitrators</dt> <dd><a href="/wiki/User:AmandaNP" title="User:AmandaNP">AmandaNP</a>,<sup id="cite_ref-prior_4-3" class="reference"><a href="#cite_note-prior-4"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> <a href="/wiki/User:Barkeep49" title="User:Barkeep49">Barkeep49</a>, <a href="/wiki/User:Bradv" title="User:Bradv">Bradv</a>, <a href="/wiki/User:Callanecc" title="User:Callanecc">Callanecc</a>,<sup id="cite_ref-prior_4-4" class="reference"><a href="#cite_note-prior-4"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> <a href="/wiki/User:Drmies" title="User:Drmies">Drmies</a>, <a href="/wiki/User:Izno" title="User:Izno">Izno</a>, <a href="/wiki/User:Joe_Roe" title="User:Joe Roe">Joe Roe</a>, <a href="/wiki/User:Jpgordon" title="User:Jpgordon">Jpgordon</a>, <a href="/wiki/User:KrakatoaKatie" title="User:KrakatoaKatie">KrakatoaKatie</a>,<sup id="cite_ref-prior_4-5" class="reference"><a href="#cite_note-prior-4"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> <a href="/wiki/User:Ks0stm" title="User:Ks0stm">Ks0stm</a>, <a href="/wiki/User:Mailer_diablo" class="mw-redirect" title="User:Mailer diablo">Mailer diablo</a>, <a href="/wiki/User:Mkdw" title="User:Mkdw">Mkdw</a>, <a href="/wiki/User:PhilKnight" title="User:PhilKnight">PhilKnight</a>, <a href="/wiki/User:RickinBaltimore" title="User:RickinBaltimore">RickinBaltimore</a>, <a href="/wiki/User:Risker" title="User:Risker">Risker</a>, <a href="/wiki/User:Salvio_giuliano" title="User:Salvio giuliano">Salvio giuliano</a><sup id="cite_ref-prior_4-6" class="reference"><a href="#cite_note-prior-4"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></dd> <dt>Others</dt> <dd><span class="plainlinks"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Special:GlobalUsers&group=staff">Some Foundation staff members</a></span> (prohibited from use by internal policy except in rare cases), <span class="plainlinks"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Special:GlobalUsers&group=ombuds">Wikimedia Ombuds</a></span><sup id="cite_ref-ombuds_5-0" class="reference"><a href="#cite_note-ombuds-5"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></dd></dl> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-prior-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-prior_4-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-prior_4-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-prior_4-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-prior_4-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-prior_4-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-prior_4-5"><sup><i><b>f</b></i></sup></a> <a href="#cite_ref-prior_4-6"><sup><i><b>g</b></i></sup></a></span> <span class="reference-text">Held prior to appointment to Arbitration Committee</span> </li> <li id="cite_note-ombuds-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-ombuds_5-0">^</a></b></span> <span class="reference-text"><a href="https://meta.wikimedia.org/wiki/Ombuds_commission" class="extiw" title="m:Ombuds commission">Ombuds commission</a> members have global CheckUser access in order to investigate allegations related to the breach of WMF <a href="https://meta.wikimedia.org/wiki/Privacy_policy" class="extiw" title="m:Privacy policy">privacy policy</a>.</span> </li> </ol></div></div><p><small>The list above is served from <a href="/wiki/Template:Functionaries" title="Template:Functionaries">Template:Functionaries</a>.</small> </p><div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Notes" data-mw-thread-id="h-Notes"><span data-mw-comment-start="" id="h-Notes"></span>Notes<span data-mw-comment-end="h-Notes"></span></h2></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text">No guarantee is given that any of these scripts are currently functional, under active development, or actively being maintained.</span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text">Checkuser <a href="/wiki/User:Mackensen" title="User:Mackensen">Mackensen</a>'s <a class="external text" href="https://en.wikipedia.org/w/index.php?title=Wikipedia:Administrators%27_noticeboard&diff=101898276&oldid=101897313">comment</a> on checkuser blocks and why they should not be lifted.</span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><a href="/wiki/Wikipedia:ArbCom" class="mw-redirect" title="Wikipedia:ArbCom">Arbitration Committee</a> <a class="external text" href="https://en.wikipedia.org/w/index.php?title=Wikipedia:Arbitration_Committee/Noticeboard&diff=374236496&oldid=374236075">statement on checkuser blocks, 18 July 2010</a></span> </li> </ol></div></div> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="See_also" data-mw-thread-id="h-See_also"><span data-mw-comment-start="" id="h-See_also"></span>See also<span data-mw-comment-end="h-See_also"></span></h2></div> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}}</style><div class="side-box metadata side-box-right plainlinks"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"> <div class="side-box-flex"> <div class="side-box-text plainlist">This page is referenced in the <span class="nowrap"><a href="/wiki/Wikipedia:Glossary" title="Wikipedia:Glossary">Wikipedia Glossary</a></span>.</div> <div class="side-box-imageright"><span class="mw-default-size" typeof="mw:File"><a href="/wiki/File:Wiki_letter_w.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/6/6c/Wiki_letter_w.svg/44px-Wiki_letter_w.svg.png" decoding="async" width="44" height="44" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/6/6c/Wiki_letter_w.svg/66px-Wiki_letter_w.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/6/6c/Wiki_letter_w.svg/88px-Wiki_letter_w.svg.png 2x" data-file-width="44" data-file-height="44"/></a></span></div></div> </div> <dl><dt>CheckUser</dt></dl> <ul><li><a href="https://meta.wikimedia.org/wiki/CheckUser_policy" class="extiw" title="m:CheckUser policy">m:CheckUser policy</a></li></ul> <dl><dt>CheckUser access</dt></dl> <ul><li><a href="https://meta.wikimedia.org/wiki/Requests_for_permission" class="extiw" title="m:Requests for permission">m:Requests for permission</a> – used by the arbitration committee to request usergroup addition</li> <li><a href="https://meta.wikimedia.org/wiki/Special:Log/rights" class="extiw" title="m:Special:Log/rights">m:User rights log</a> – shows CheckUser assignments and removals. Enter <b><code>User:USERNAME@enwiki</code></b> in the "Target" box.</li> <li><a href="/wiki/Wikipedia:Arbitration_Committee/CheckUser_and_Oversight_elections" class="mw-redirect" title="Wikipedia:Arbitration Committee/CheckUser and Oversight elections">Wikipedia:Arbitration Committee/CheckUser and Oversight elections</a></li></ul> <dl><dt>Related pages</dt></dl> <ul><li><a href="https://meta.wikimedia.org/wiki/Steward_requests/Checkuser" class="extiw" title="m:Steward requests/Checkuser">m:Steward requests/Checkuser</a> – page at <a href="/wiki/Meta_Wiki" class="mw-redirect" title="Meta Wiki">metawiki</a> for requesting checks that take place in more than one project.</li> <li><a href="/wiki/Wikipedia:Requests_for_comment/Community_expectation_of_Checkuser" title="Wikipedia:Requests for comment/Community expectation of Checkuser">RfC: Community expectation of Checkuser</a></li> <li><a href="/wiki/Wikipedia:Identification" class="mw-redirect" title="Wikipedia:Identification">Wikipedia:Identification</a></li> <li><a href="/wiki/Wikipedia:IP_block_exemption" title="Wikipedia:IP block exemption">Wikipedia:IP block exemption</a></li> <li><a href="/wiki/Wikipedia:User_access_levels" title="Wikipedia:User access levels">Wikipedia:User access levels</a></li> <li><a href="https://meta.wikimedia.org/wiki/Privacy_policy" class="extiw" title="m:Privacy policy">m:Privacy policy</a></li> <li><a href="/wiki/Wikipedia:Arbitration_Committee/CheckUser_and_Oversight" title="Wikipedia:Arbitration Committee/CheckUser and Oversight">Wikipedia:Arbitration Committee/CheckUser and Oversight</a> – Local roles, appointments, and complaints about tool usage</li> <li><a href="https://meta.wikimedia.org/wiki/Ombuds_commission" class="extiw" title="m:Ombuds commission">m:Ombuds commission</a> – Global oversight of the tool for all wikis</li> <li><a class="external text" href="https://lists.wikimedia.org/pipermail/foundation-l/2006-April/020134.html">[Foundation-l] CheckUser (thoughts)</a> – by Anthere on April 22, 2006, includes a historic background</li> <li><span class="nowrap">{{</span><a href="/wiki/Template:User_checkuser_since" title="Template:User checkuser since">User checkuser since</a><span class="nowrap">}}</span> – a userbox to indicate having checkuser permission with period of time</li> <li><span class="nowrap">{{</span><a href="/wiki/Template:User_wikipedia/Checkuser" title="Template:User wikipedia/Checkuser">User wikipedia/Checkuser</a><span class="nowrap">}}</span> – a <a href="/wiki/Wikipedia:Userboxes" title="Wikipedia:Userboxes">userbox</a> template to indicate you have the checkuser user right</li> <li><span class="nowrap">{{</span><a href="/wiki/Template:Checkuser_topicon" title="Template:Checkuser topicon">Checkuser topicon</a><span class="nowrap">}}</span> – a <a href="/wiki/Template:Top_icon" title="Template:Top icon">top icon</a> template to indicate you have the checkuser user right – adds a category to page automatically</li></ul> <dl><dt>Technical</dt></dl> <ul><li><a href="https://www.mediawiki.org/wiki/CheckUser" class="extiw" title="mw:CheckUser">mw:CheckUser</a> – more detailed description of how the feature works and how to install the extension on one's own wiki.</li> <li><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Commons-logo.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/12px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/24px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376"/></a></span> Media related to <a href="https://commons.wikimedia.org/wiki/Category:MediaWiki_CheckUser" class="extiw" title="commons:Category:MediaWiki CheckUser">MediaWiki CheckUser</a> at Wikimedia Commons</li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist 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.navbox-abovebelow{background-color:#e6e6ff}.mw-parser-output .navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Wikipedia_accounts_and_governance" style="padding:3px"><table class="nowraplinks hlist mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Wikipedia_accounts" title="Template:Wikipedia accounts"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Wikipedia_accounts" title="Template talk:Wikipedia accounts"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Wikipedia_accounts" title="Special:EditPage/Template:Wikipedia accounts"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Wikipedia_accounts_and_governance" style="font-size:114%;margin:0 4em">Wikipedia <a href="/wiki/Wikipedia:User_access_levels" title="Wikipedia:User access levels">accounts</a> and <a href="/wiki/Wikipedia:Administration#Human_and_legal_administration" title="Wikipedia:Administration">governance</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Wikipedia:User_access_levels#Unregistered_users" title="Wikipedia:User access levels">Unregistered (IP) users</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Wikipedia:Why_create_an_account%3F" title="Wikipedia:Why create an account?">Why create an account?</a></li> <li><a href="/wiki/Special:CreateAccount" title="Special:CreateAccount">Create an account</a></li> <li><a href="/wiki/Wikipedia:Request_an_account" title="Wikipedia:Request an account">Request an account</a></li> <li><a href="/wiki/Wikipedia:IP_editors_are_human_too" title="Wikipedia:IP editors are human too">IPs are human too</a></li> <li><a href="/wiki/Wikipedia:IP_addresses_are_not_people" title="Wikipedia:IP addresses are not people">IP addresses are not people</a></li> <li><a href="/wiki/Wikipedia:IP_hopper" title="Wikipedia:IP hopper">IP hopper</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Registered users</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Wikipedia:New_account" title="Wikipedia:New account">New account</a></li> <li><a href="/wiki/Help:Logging_in" title="Help:Logging in">Logging in</a> <ul><li><a href="/wiki/Help:Reset_password" title="Help:Reset password">Reset passwords</a></li></ul></li> <li><a href="/wiki/Wikipedia:Username_policy" title="Wikipedia:Username policy">Username policy</a> <ul><li><a href="/wiki/Wikipedia:Changing_username" title="Wikipedia:Changing username">Changing username</a></li> <li><a href="/wiki/Wikipedia:Usernames_for_administrator_attention" title="Wikipedia:Usernames for administrator attention">Usernames for administrator attention</a></li></ul></li> <li><a href="/wiki/Wikipedia:Unified_login" title="Wikipedia:Unified login">Unified login or SUL</a></li> <li><a href="/wiki/Wikipedia:Sockpuppetry#Legit" title="Wikipedia:Sockpuppetry">Alternate account</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Account security</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Wikipedia:Password_strength_requirements" title="Wikipedia:Password strength requirements">Password strength requirements</a></li> <li><a href="/wiki/Wikipedia:User_account_security" title="Wikipedia:User account security">User account security</a></li> <li><a href="/wiki/Wikipedia:Personal_security_practices" title="Wikipedia:Personal security practices">Personal security practices</a></li> <li><a href="/wiki/Help:Two-factor_authentication" title="Help:Two-factor authentication">Two-factor authentication</a> <ul><li><a href="/wiki/Wikipedia:Using_AWB_with_2FA" title="Wikipedia:Using AWB with 2FA">2FA for AWB</a></li></ul></li> <li><a href="/wiki/Template:Committed_identity" title="Template:Committed identity">Committed identity</a></li> <li><a href="/wiki/Wikipedia:On_privacy,_confidentiality_and_discretion" title="Wikipedia:On privacy, confidentiality and discretion">On privacy, confidentiality and discretion</a></li> <li><a href="/wiki/Wikipedia:Compromised_accounts" title="Wikipedia:Compromised accounts">Compromised accounts</a></li> <li><a href="/wiki/Wikipedia:How_to_not_get_outed_on_Wikipedia" title="Wikipedia:How to not get outed on Wikipedia">How to not get outed</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Blocks, bans, sanctions,<br/>global actions</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Wikipedia:Blocking_policy" title="Wikipedia:Blocking policy">Blocking policy</a> <ul><li><a href="/wiki/Wikipedia:FAQ/Blocks" title="Wikipedia:FAQ/Blocks">FAQ</a></li> <li><a href="/wiki/Wikipedia:Administrators%27_guide/Blocking" title="Wikipedia:Administrators' guide/Blocking">Admin's guide</a></li> <li><a href="/wiki/Wikipedia:Administrators%27_guide/Blocking/Tools" title="Wikipedia:Administrators' guide/Blocking/Tools">Tools</a></li> <li><a href="/wiki/Wikipedia:Autoblock" title="Wikipedia:Autoblock">Autoblock</a></li></ul></li> <li><a href="/wiki/Wikipedia:Appealing_a_block" title="Wikipedia:Appealing a block">Appealing a block</a> <ul><li><a href="/wiki/Wikipedia:Guide_to_appealing_blocks" title="Wikipedia:Guide to appealing blocks">Guide to appealing blocks</a></li> <li><a href="/wiki/Wikipedia:Unblock_Ticket_Request_System" title="Wikipedia:Unblock Ticket Request System">UTRS Unblock Ticket Request System</a></li></ul></li> <li><a href="/wiki/Wikipedia:Blocking_IP_addresses" title="Wikipedia:Blocking IP addresses">Blocking IP addresses</a> <ul><li><a href="https://www.mediawiki.org/wiki/Help:Range_blocks" class="extiw" title="mw:Help:Range blocks">Range blocks</a></li> <li><a href="https://www.mediawiki.org/wiki/Help:Range_blocks/IPv6" class="extiw" title="mw:Help:Range blocks/IPv6">IPv6</a></li> <li><a href="/wiki/Wikipedia:Open_proxies" title="Wikipedia:Open proxies">Open proxies</a></li></ul></li> <li><a href="/wiki/Wikipedia:Banning_policy" title="Wikipedia:Banning policy">Banning policy</a> <ul><li><a href="/wiki/Wikipedia:Arbitration_Committee/Ban_appeals" title="Wikipedia:Arbitration Committee/Ban appeals">ArbCom appeals</a></li></ul></li> <li><a href="/wiki/Wikipedia:Sanctions" title="Wikipedia:Sanctions">Sanctions</a> <ul><li><a href="/wiki/Wikipedia:Editing_restrictions" title="Wikipedia:Editing restrictions">Personal sanctions</a></li> <li><a href="/wiki/Wikipedia:General_sanctions" title="Wikipedia:General sanctions">General sanctions</a></li> <li><a href="/wiki/Wikipedia:Contentious_topics" title="Wikipedia:Contentious topics">Contentious topics</a> and <a href="/wiki/Wikipedia:Arbitration_enforcement_log" title="Wikipedia:Arbitration enforcement log">Log</a></li> <li><a href="/wiki/Wikipedia:Sanctions_(essay)" title="Wikipedia:Sanctions (essay)">Essay</a></li></ul></li> <li><a href="/wiki/Wikipedia:Indefinite_is_not_infinite" title="Wikipedia:Indefinite is not infinite">Indef ≠ infinite</a></li> <li><a href="/wiki/Wikipedia:Long-term_abuse" title="Wikipedia:Long-term abuse">Long-term abuse</a></li> <li><a href="/wiki/Wikipedia:Standard_offer" title="Wikipedia:Standard offer">Standard offer</a></li> <li><a href="/wiki/Wikipedia:Global_actions" title="Wikipedia:Global actions">Global actions</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related to accounts</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Wikipedia:Sockpuppetry" title="Wikipedia:Sockpuppetry">Sockpuppetry</a></li> <li><a href="/wiki/Wikipedia:Single-purpose_account" title="Wikipedia:Single-purpose account">Single-purpose account</a></li> <li><a href="/wiki/Wikipedia:Sleeper_account" title="Wikipedia:Sleeper account">Sleeper account</a></li> <li><a href="/wiki/Wikipedia:Vandalism-only_account" title="Wikipedia:Vandalism-only account">Vandalism-only account</a></li> <li><a href="/wiki/Wikipedia:Wikibreak" title="Wikipedia:Wikibreak">Wikibreak</a> <ul><li><a href="/wiki/Wikipedia:WikiProject_User_scripts/Scripts/WikiBreak_Enforcer" title="Wikipedia:WikiProject User scripts/Scripts/WikiBreak Enforcer">Enforcer</a></li></ul></li> <li><a href="/wiki/Wikipedia:Retiring" title="Wikipedia:Retiring">Retiring</a> <ul><li><a href="/wiki/Wikipedia:Courtesy_vanishing" title="Wikipedia:Courtesy vanishing">Courtesy vanishing</a></li></ul></li> <li><a href="/wiki/Wikipedia:Clean_start" title="Wikipedia:Clean start">Clean start</a> <ul><li><a href="/wiki/User:Worm_That_Turned/Quiet_return" title="User:Worm That Turned/Quiet return">Quiet return</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Wikipedia:User_access_levels" title="Wikipedia:User access levels">User groups</a><br/> and <a href="https://meta.wikimedia.org/wiki/User_groups#Global_user_groups" class="extiw" title="m:User groups">global user groups</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Wikipedia:Requests_for_permissions" title="Wikipedia:Requests for permissions">Requests for permissions</a> <ul><li><a href="/wiki/Wikipedia:Requests_for_permissions/Administrator_instructions" title="Wikipedia:Requests for permissions/Administrator instructions">Admin instructions</a></li> <li><a href="/wiki/Wikipedia:Administrators%27_guide/Granting_and_revoking_user_rights" title="Wikipedia:Administrators' guide/Granting and revoking user rights">Admin guide</a></li></ul></li> <li><a href="/wiki/Wikipedia:Account_creator" title="Wikipedia:Account creator">Account creator</a> <ul><li><a href="/wiki/Wikipedia:Requests_for_permissions/Account_creator" title="Wikipedia:Requests for permissions/Account creator">PERM</a></li></ul></li> <li><a href="/wiki/Wikipedia:User_access_levels#Confirmed_users" title="Wikipedia:User access levels">(Auto) confirmed</a> <ul><li><a href="/wiki/Wikipedia:Requests_for_permissions/Confirmed" title="Wikipedia:Requests for permissions/Confirmed">PERM</a></li></ul></li> <li><a href="/wiki/Wikipedia:Autopatrolled" title="Wikipedia:Autopatrolled">Autopatrolled</a> <ul><li><a href="/wiki/Wikipedia:Requests_for_permissions/Autopatrolled" title="Wikipedia:Requests for permissions/Autopatrolled">PERM</a></li></ul></li> <li><a href="/wiki/Wikipedia:AutoWikiBrowser" title="Wikipedia:AutoWikiBrowser">AutoWikiBrowser</a> <ul><li><a href="/wiki/Wikipedia:Requests_for_permissions/AutoWikiBrowser" title="Wikipedia:Requests for permissions/AutoWikiBrowser">PERM</a></li></ul></li> <li><a href="/wiki/Wikipedia:Bot_policy" title="Wikipedia:Bot policy">Bot</a> <ul><li><a href="/wiki/Wikipedia:Bots/Requests_for_approval" title="Wikipedia:Bots/Requests for approval">Request</a></li></ul></li> <li><a href="/wiki/Wikipedia:Edit_filter_helper" title="Wikipedia:Edit filter helper">Edit filter helper</a> <ul><li><a href="/wiki/Wikipedia:Edit_filter_noticeboard" title="Wikipedia:Edit filter noticeboard">Request</a></li></ul></li> <li><a href="/wiki/Wikipedia:Event_coordinator" title="Wikipedia:Event coordinator">Event coordinator</a> <ul><li><a href="/wiki/Wikipedia:Requests_for_permissions/Event_coordinator" title="Wikipedia:Requests for permissions/Event coordinator">PERM</a></li></ul></li> <li><a href="/wiki/Wikipedia:User_access_levels#Extendedconfirmed" title="Wikipedia:User access levels">Extended confirmed</a> <ul><li><a href="/wiki/Wikipedia:Requests_for_permissions/Extended_confirmed" title="Wikipedia:Requests for permissions/Extended confirmed">PERM</a></li></ul></li> <li><a href="/wiki/Wikipedia:File_mover" title="Wikipedia:File mover">File mover</a> <ul><li><a href="/wiki/Wikipedia:Requests_for_permissions/File_mover" title="Wikipedia:Requests for permissions/File mover">PERM</a></li></ul></li> <li><a href="/wiki/Wikipedia:IP_block_exemption" title="Wikipedia:IP block exemption">IP block exempt</a> <ul><li><a href="/wiki/Wikipedia:Unblock_Ticket_Request_System" title="Wikipedia:Unblock Ticket Request System">Request</a></li></ul></li> <li><a href="/wiki/Wikipedia:Mass_message_senders" title="Wikipedia:Mass message senders">Mass message sender</a> <ul><li><a href="/wiki/Wikipedia:Requests_for_permissions/Mass_message_sender" title="Wikipedia:Requests for permissions/Mass message sender">PERM</a></li></ul></li> <li><a href="/wiki/Wikipedia:New_pages_patrol/Reviewers" title="Wikipedia:New pages patrol/Reviewers">New page reviewer</a> <ul><li><a href="/wiki/Wikipedia:Requests_for_permissions/New_page_reviewer" title="Wikipedia:Requests for permissions/New page reviewer">PERM</a></li></ul></li> <li><a href="/wiki/Wikipedia:Page_mover" title="Wikipedia:Page mover">Page mover</a> <ul><li><a href="/wiki/Wikipedia:Requests_for_permissions/Page_mover" title="Wikipedia:Requests for permissions/Page mover">PERM</a></li></ul></li> <li><a href="/wiki/Wikipedia:Reviewing_pending_changes" title="Wikipedia:Reviewing pending changes">Pending changes reviewer</a> <ul><li><a href="/wiki/Wikipedia:Requests_for_permissions/Pending_changes_reviewer" title="Wikipedia:Requests for permissions/Pending changes reviewer">PERM</a></li></ul></li> <li><a href="/wiki/Wikipedia:Rollback" title="Wikipedia:Rollback">Rollback</a> <ul><li><a href="/wiki/Wikipedia:Requests_for_permissions/Rollback" title="Wikipedia:Requests for permissions/Rollback">PERM</a></li></ul></li> <li><a href="/wiki/Wikipedia:Template_editor" title="Wikipedia:Template editor">Template editor</a> <ul><li><a href="/wiki/Wikipedia:Requests_for_permissions/Template_editor" title="Wikipedia:Requests for permissions/Template editor">PERM</a></li></ul></li> <li><a href="/wiki/Wikipedia:Global_rights_policy" title="Wikipedia:Global rights policy">Global rights policy</a> <ul><li><a href="/wiki/Wikipedia:Volunteer_Response_Team" title="Wikipedia:Volunteer Response Team">Volunteer Response Team</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Advanced user groups</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Wikipedia:Administrators" title="Wikipedia:Administrators">Administrator</a> <ul><li><a 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