This hidden tracking category lists pages with CS1 citations that use |url-status=usurped or |url-status=unfit. The keywords unfit and usurped are intended to identify original URLs that point to live sites that are inappropriate: spam, advertising, porn, etc.

A URL that returns a HTTP 404 error is not considered to be unfit and, in such cases, editors should set |url-status=dead.

CS1 and CS2 templates in pages listed in this category should be checked to ensure that the unfit and usurped keywords are correctly applied.

Only Module:Citation/CS1 should directly add pages to this category.