Other languages:
MediaWiki extensions manual
OOjs UI icon advanced-invert.svg
Release status: stable
Implementation Special page
Description Creates a special page that lists duplicate user accounts.
Author(s) David Wong (daw5423talk)
Latest version 1.0.0 (2020-05-01)
MediaWiki 1.26+
License GNU General Public License 2.0 or later

Check usage and version matrix.

The ListDuplicateUsers extension creates a special page that lists duplicate user accounts, which are determined by email address.


  • Download and place the file(s) in a directory called ListDuplicateUsers in your extensions/ folder.
  • Add the following code at the bottom of your LocalSettings.php :
    wfLoadExtension( 'ListDuplicateUsers' );
  • Configure as required.
  •   Done – Navigate to Special:Version on your wiki to verify that the extension is successfully installed.


Append these lines to the end of the "LocalSettings.php" file, possibly located at "/opt/htdocs/mediawiki/LocalSettings.php":

$wgGroupPermissions['listduplicateusers']['listduplicateusers'] = true;
$wgGroupPermissions['bureaucrat']['listduplicateusers'] = true;