1. The credit card is damaged or degaussed: The credit card has been used for a long time or is not properly protected, resulting in the credit card being bent or folded, and then the card cannot be swiped. Moreover, if it comes into contact with metal and other objects frequently, it may become demagnetized over time, making it impossible to swipe the POS machine.

2. Entering the wrong password too many times: Bank credit cards require a password to be used. If you enter the wrong password more than three times in a day, the credit card will be automatically locked. This is also a credit card issue. The reason why the card is abnormal.

3. The credit card is frozen or reported as lost: If the cardholder has overdue behavior, cash-out behavior, or other unreasonable behavior with the card, the bank will freeze the user's credit card. If the credit card is lost and the applicant reports the loss, the credit card cannot be used in this case.

Extended information:

Notes:

1. The overdraft interest is 5/10,000 per day, compounded monthly.

2. If you pay with a credit card in full before the payment due date, you can enjoy interest-free, that is, there is no interest.

3. If you only pay the minimum repayment amount, you will not receive this treatment. Interest will be charged from the next day after consumption. If you withdraw cash, it does not matter whether the full payment is made before the due payment date. Interest is unavoidable and will be charged at 0.5% on the day.

4. If the payment is overdue, there will be a late fee, which is a one-time charge of 5% of the unpaid portion of the minimum repayment amount.

Baidu Encyclopedia - China Merchants Bank Credit Card

Baidu Encyclopedia - Abnormalities

Baidu Encyclopedia - Credit Card Risks