U.S. President Donald Trump declared on Friday that all documents signed using an auto-pen during Joe Biden’s presidency are now “nullified,” marking an escalation in the Republican president’s criticism of his Democratic predecessor.

In a post on his social media platform, Truth Social, Trump stated, “Every document signed by Sleepy Joe Biden using an auto-pen—estimated at around 92 percent—is hereby considered null and void, no longer valid, and of no effect.”

The president added that he would revoke “all executive orders and anything else not personally signed by the corrupt Joe Biden,” claiming that those who operated the auto-pen did so “illegally.”