House Oversight Committee Chair James Comer, who is leading the Republican investigation into former President Joe Biden’s reliance on an autopen, has himself been using a digital facsimile of his signature on official committee correspondence, according to documents reviewed by NBC News. Metadata on 16 letters seeking interviews with former Biden aides and on subpoena cover sheets shows Comer’s signature was inserted as an image rather than written by hand. A committee spokeswoman said the practice is routine for both parties in Congress and stressed that legally binding subpoenas issued by the chairman still carry a handwritten—or “wet”—signature. Comer has argued that Biden’s occasional use of an autopen on executive actions could indicate the former president was not fully aware of what was being signed. Democrats counter that the chairman’s reliance on a digital signature for investigatory letters undercuts the GOP’s line of attack and underscores the prevalence of automated signatures throughout Washington.