Category:Checkuser with no specified user

This is a maintenance category, used for maintenance of the Wikipedia project. It is not part of the encyclopedia and contains non-article pages, or groups articles by status rather than subject. Do not include this category in content categories. This is a hidden category. It is not shown on its member pages, unless the corresponding user preference (Appearance → Show hidden categories) is set.

This category tracks pages that call {{Checkuser}} without passing a user to it. That is, it catches default behavior, that might be intended for demonstration cases or due to misuse. See also Wikipedia talk:Sockpuppet investigations#Technical help needed.