US President Donald Trump announced he is nullifying all documents signed by his predecessor Joe Biden, including executive pardons, claiming Biden used an autopen to sign them. The autopen, a device replicating a person’s signature, has long been used by presidents from both parties for official documents. Legal experts say Trump’s move is unprecedented and lacks constitutional or statutory basis, as there is no law requiring a president to personally sign such documents or allowing one president to revoke another’s pardons. Trump made the announcement on his social media platform Truth Social, asserting that any pardon or legal document signed this way is invalid. Biden had issued several pardons before leaving office, including for family members and nonviolent drug offenders. Reports suggest Trump’s action may not affect Hunter Biden’s pardon, which was hand-signed, but could impact others like Dr. Anthony Fauci. Analysts view Trump’s decision as politically motivated and legally unenforceable.