Quick Change Artist
A Bunco crime; a Quick Change Artist, or sometmes, a Short Change Artist, is someone who steals money by confusing cashiers while they are making change. They do this in many ways. Usually the thief attempts to distract or confuse the cashier during the transaction, does a quick sleight of hand, and then claims they were not given the correct amount. They're called "artists" because they are extraordinarily good at what they do.