Why does Marriott Hotel deduct money when it checks out?

Marriott Hotel still has to deduct money when checking out, because there are two situations that will cause repeated deduction:

1. The cashier made a mistake.

2. The acquisition system is faulty. There is no need to panic when such problems occur, because the credit card transaction must be based on the signed POSS receipt, which means that as long as the POSS receipt of a transaction has been signed and there are two duplicate transactions, you can call the bank customer service to apply for transaction cancellation.