There are many possibilities for credit card invalidation, and the common situations are as follows:

1. Card is not activated or inquiry password and transaction password are not set after activation. Please activate and set the password before use;

2. The amount is insufficient, please repay first;

3. If the POS line is busy or faulty, you can swipe your card later or replace the POS card;

4. If your card is a chip card, you need to insert the card for transaction, and swiping the card with a magnetic stripe will lead to transaction failure;

5. The magnetic stripe of the credit card has been degaussed or the card has been damaged. Please call the customer service hotline to apply for a replacement card.

6. The credit card status is abnormal. If the credit card is deactivated, please contact the customer service hotline.

7. Both the single transaction amount and the accumulated transaction amount of the day exceed the bank authorization limit. Please contact the customer service hotline.