The information for this scam comes from a Facebook post by Jack Sng here. When you stay at a hotel, you generally give them your credit card for an incidental charges like the minibar. Essentially, the scammer calls a hotel and asks for a random room. It happens to be your room. You answer the phone and hear ‘This is the front desk. When checking in, we came across a problem with your charge card information. Please re-read me your credit card numbers and verify the last 3 digits numbers at the reverse side of your charge card." You unknowingly just tell the scammer your credit card info. Jack says if you receive a call like this then tell the caller you will go to the front desk to clear up any problems. After you hang up, call the front desk and see if there was an actual problem with your credit card.