President Donald Trump has vowed to terminate all documents, including pardons, signed by predecessor Joe Biden over his "unauthorised" use of autopen.
An autopen is a device used to replicate a human signature, being programmed to imitate the exact style of a person's autograph while holding a physical pen.
Mr Trump has frequently blasted his predecessor over his use of the device to sign off on official documents.
The President has also labelled Mr Biden's time in office as the "autopen presidency".
The President has labelled Mr Biden's time in office as the 'autopen presidency'
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Announcing the move on his Truth Social platform, Mr Trump wrote: "Any and all documents, proclamations, executive orders, memorandums, or contracts, signed by order of the now infamous and unauthorised 'autopen,' within the administration of Joseph R. Biden Jr, are hereby null, void, and of no further force or effect.
"Anyone receiving pardons, commutations, or any other legal document so signed, please be advised that said document has been fully and completely terminated, and is of no legal effect.
"Thank you for your attention to this matter!"
Mr Biden issued a series of pardons before leaving office in January, including members of his own family.
Mr Biden issued a series of pardons before leaving office in January, including members of his own family
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The former President claimed the move was to shield his relatives from politically motivated investigations.
During his State Visit to Britain in September, Mr Trump told reporters that the Democrat "illegally used" the autopen, adding that "he never gave the orders".
He added: "He never told them what to do. And I guess the only one he signed, or one of the few he signed, was the pardon for his son."
In June, the President ordered an investigation into Mr Biden's use of autopens - and whether figures within his Democrat administration covered up his diminishing cognitive state.
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In June, the President ordered an investigation into Mr Biden's use of autopens
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US Pardon Attorney Ed Martin pledged to examine whether those around the former President were "taking advantage of him through use of autopen or other means”.
Former President Biden has repeatedly claimed that he called the shots during his time in the White House.
After the investigation began, the Democrat said: “Let me be clear: I made the decisions during my presidency.
“I made the decisions about the pardons, executive orders, legislation, and proclamations.
"Any suggestion that I didn’t is ridiculous and false.”
Mr Trump replaced a portrait of the ex-President with a picture of an autopen in a mocking swipe
| WHITE HOUSEIn September, Mr Trump replaced a portrait of the ex-President with a picture of an autopen in a mocking swipe to his predecessor.
The lampoon to Mr Biden was unveiled at the new Presidential Walk of Fame outside the White House's West Wing.
Explaining how the idea for the gag may have come about, former White House Press Secretary Sean Spicer told GB News that the President often chimed in on discussions around potential pranks to play on their opponents.
He added that Mr Trump would have undoubtedly "signed off on it".
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