My interpretation, coupled with tidbits of info from various sources, is that if you unknowingly pass a fake, you're off the hook. However, you can't just say you didn't know if you really did know. Cops are trained to pick up on that sort of deception. They'll know if you're lying. The point here is that as soon as you discover you've got a fake, don't try to get rid of it by spending it or depositing it. Turn it in to the police. Once you know you've got a fake, if you try to spend it, you're as guilty as the guy who made it, and morally no better either.
Logged
BWJM, F.O.N.A.
Life Member of CPMS, RCNA, ONA, ANA, IBNS, WCS.
President, IBNS Ontario Chapter.
Treasurer, Waterloo Coin Society.
Show Chair, Cambridge Coin Show.
Fellow of the Ontario Numismatic Association.