Loi Gayssot

The Gayssot Act or Gayssot Law (French: Loi Gayssot), enacted on 13 July 1990, makes it an offense in France to question the existence or size of the category of crimes against humanity as defined in the London Charter of 1945, on the basis of which Nazi leaders were convicted by the International Military Tribunal at Nuremberg in 1945-46 (art.9).

Communist deputy Jean-Claude Gayssot proposed the law. It is one of several European laws prohibiting Holocaust denial. Its first article states that "any discrimination founded on membership or non-membership of an ethnic group, a nation, a race or a religion is prohibited." The law also requires the Commission nationale consultative des droits de l'homme (National Consultative Commission on Human Rights), created in 1947, to publish an annual report on relations between ethnicities in France.

At the request of the International League against Racism and Anti-Semitism, Paul Marchandeau, center-right Justice Minister in the 1938-1939 third and fourth Daladier governments, issued the decree of 21 April 1939 amending the Law on the Freedom of the Press of 29 July 1881 by providing prosecution "when defamation or insult committed against a group of persons, by their origin, race or religion, will have been designed to arouse hatred among citizens or residents" (translated). This decree was repealed by the law of the Vichy collaborationist government of 16 August 1940. The decree came again into force after the Liberation of France in 1944 by an ordinance of 9 August 1944 repealing most of the Vichy legislation.