Just remember this. If there is a problem with your credit card, it is immediately (within seconds) detected. Ever go to the register and hear the clerk say to you or you overhear; your card is declined? That doesn't happen minutes later. If you know your card is good and you get that kind of call, just tell them you will call the company and get it straightened out. Also tell them to read the account number back to you and ask for the security code on the back to you. Also make note and have short conversation with the clerk and repeat their name in conversation about 3-4 times. If you get that call from the Front Desk they usually say who they are. If you say "Oh thanks John and know the FD clerks name is James or Mary or ? you can report it. Tell them to call you right back because think you actually left it at the desk. A friend of mine did this. Went down to the FD and told them what was going on. The scammer also was nearby and tried to pick up his card. Quick little sting. Nailed the scammer who had a foreign accent and no definite lisp as the clerk at the front desk. The scammer was working out of his apartment/office couple doors down.