copyfraud

thumb|right| Second-century bronze jug held by the British Museum, with false copyright claim, while on loan to Tullie House Museum|alt=Photograph of an ancient bronze on display in a museum; beneath it, a warning states "Please do not photograph this object as it is protected by copyright." A copyfraud is a false copyright claim by an individual or institution with respect to content that is in the public domain. Such claims are unlawful, at least under US and Australian copyright law, because material that is not copyrighted is free for all to use, modify and reproduce. Copyfraud also includes overreaching claims by publishers, museums and others, as where a legitimate copyright owner knowingly, or with constructive knowledge, claims rights beyond what the law allows.

The term copyfraud was coined by Jason Mazzone, a Professor of Law at the University of Illinois. Because copyfraud carries little or no oversight by authorities and few legal consequences, it exists on a massive scale, with millions of works in the public domain falsely labelled as copyrighted. Payments are therefore unnecessarily made by businesses and individuals for licensing fees. Mazzone states that copyfraud stifles valid reproduction of free material, discourages innovation and undermines free speech rights. Other legal scholars have suggested public and private remedies, and a few cases have been brought involving copyfraud.