1. Credit card not opened;

2. When the card reader is in use, the line is busy, or there is a fault, or the card reader itself has a fault, and the transaction information cannot be transmitted;

3. The available credit card limit is insufficient;

4. The magnetic stripe on the back of the card may be demagnetized or the card may be damaged;

5. Merchants' consumption restricted or prohibited by the state and regulatory agencies. For example, the banking regulatory bureau has restrictive requirements on non-personal daily consumption such as housing, building materials and wholesale.

Cardholders can check one by one according to the above reasons after failing to swipe their credit cards. If the credit card limit is insufficient, simply apply for temporary withdrawal and repay in time. If the card is worn, damaged or even demagnetized, it is recommended to replace the card in time before the year.