The use of the autopen, a device that reproduces signatures and is ubiquitous in government and business, is ordinarily uncontroversial. There is no power to undo a pardon in the Constitution or case law.

A 2005 memo from the Justice Department, issued during George W. Bush’s presidency, said that using an autopen to sign official documents is legal, and the practice is now widely used.

In a post on Truth Social overnight, President Donald Trump claims that some pardons by President Joe Biden are “VOID, VACANT, AND OF NO FURTHER FORCE OR EFFECT,” saying an autopen was used to forge the former President’s signature.