You arrive at your hotel and check in at the front desk. Typically when checking in the hotel requires that you keep your credit card on file in case you would acquire any additional charges.
After checking in you go to your room and settle in. All is well.
Shortly after, the hotel receives a call and the caller asks for (as an example) room 620 – which just so happens to be your room.
The phone in your room rings. Upon answering, the person on the other end explains “This is the front desk. When checking in, we encountered an error with your charge card information. Would you mind please re-reading me your credit card number and verifying the last 3 digits on the back of your card?”
Unaware that this is in fact a scam by someone calling from outside of the hotel and believing this call is actually coming from the front desk of the hotel, you oblige. The thought of someone calling your hotel, randomly picking a room number, and asking for your credit card information never crossed your mind.
How to protect yourself:
If you ever encounter this scenario on your travels, tell the caller that you will be down to the front desk to clear up any problems. Then, go to the front desk or call directly and ask if there was a problem. If there were none, inform the manager of the hotel that someone tried to impersonate a front desk employee and scam you of your credit card information.