The 100-dollar bill turned out to be a 'counterfeit'. [='fake', 'phony']
They were 'counterfeiting' money in his garage.
He 'counterfeited' [='forged'] the documents.
(..) Hey, get some booties on them things. You're crapping up the floor. Check his visa. The Cephalopods have been making counterfeits at Kinko's on Canal. And why do I have a dead Tricrainasloph going through passport control? That'd be my fault. I'm very sorry. Please don't neuralyze me, sir. (..)2002 Men in Black II