Beall's List was a prominent list of predatory open-access publishers that was maintained by University of Colorado librarian Jeffrey Beall on his blog Scholarly Open Access. The list aimed to document open-access publishers who did not perform real peer review, effectively publishing any article as long as the authors pay the open access fee. Originally started as a personal endeavor in 2008, Beall's List became a widely followed piece of work by the mid-2010s. Its influence led some publishers on the list to threaten defamation lawsuits against Beall, as well as to lodge official complaints against Beall's work to the University of Colorado. As a result, Beall deactivated his blog and the list in January 2017.