The credit card transaction is abnormal, which may be caused by the following reasons: the bank payment channel is being maintained and upgraded; The credit card is overdue and the card is frozen; The current transaction is risky, and the bank refuses the user to pay by credit card; Card damaged or demagnetized; Consumer business is marked as suspicious by banks.

Therefore, when the credit card transaction is abnormal and the user can't judge the reason, he can directly call the customer service hotline of the issuing bank and ask the manual customer service to help the user solve the problem.

When will the credit card be blocked?

Generally, there are the following situations:

1. The user failed to repay in time after swiping the card, resulting in overdue. If it is repeated, the bank will directly seal the card.

2. When the user swiped the card, he didn't pay attention. He swiped the card on the pos machine with code set and code jump, which was more easily blocked by the bank.

3. Users don't apply for credit cards themselves, but let the intermediary handle and submit the materials. Once the bank finds out, it will immediately seal the card.

4. The bank will test the bank card. If the user is found to have made a transaction with the same credit card at two or more terminals within half an hour, the bank will also seal the card.

5. Users who use bank cards for abnormal transactions will also be blocked, or even blacklisted in serious cases.