Transfermarkt is a German-based website that has footballing information, such as scores, results, transfer news, and fixtures. Despite its extensive database, the website should not be used as a source in articles, because it does not meet Wikipedia's standards of reliability. This is because much of the website's content is user-generated. To quote the site's login page: Whether player, manager, club, or match report – as a Transfermarkt user you can edit and complete almost all data yourself. Simply click the gear, fill in the form, and click submit., which means that the website qualifies as a self-published source.

Discussion history

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Below is a list of discussions across various Wikipedia forums, in which the reliability of Transfermarkt is discussed.