Oh, goodness. There should be a hotline to report these things to -- Western Union maintains one for money orders, but I believe there's a similar government one for bank accounts. It's what you're supposed to do, as a clerk, if someone buys a money order for one of these scams and you can't talk them out of it -- go ahead and sell it (because they'll find a way, if they really want to), but then call the hotline and report the customer's name, which scam it is, and the number of the money order. (I assume you'd report the bank routing info, instead.)