normally reconized as three factors to a crime

they are intent, motive, and ability or the where with all to commit...not having knowledge that your action is a crime is no defense, but can go towards a no intent defense...but proving that a person has knowledge that the coins they are selling are counterfeit, might be hard to do. thus no intent. then there is the cost of a trial and the associated matters. that is probably why we don't see a lot of prosecutions

dean