1. Usually, the transaction failure is caused by an abnormal card. Transaction failed, please contact the issuing bank. The simple understanding is that users fail to use bank cards for transactions. Credit cards usually appear when swiping cards on pos machines. At this time, you can call the bank's customer service hotline to find out what caused it, and then correct it.

2. The literal meaning of "Please contact the issuing bank if the transaction fails" means that the credit card fails and the cardholder needs to contact the issuing bank. There is an error code before "Please contact the issuing bank if the transaction fails", and the reason for the transaction failure can be judged according to the error code. The issuing bank refers to the bank that issues bank cards.

Error codes 1 and 0 1 indicate that the balance in the bank card is insufficient, or the balance in the bank account is insufficient, and the cardholder needs to keep the balance in the bank card for recharging.

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2.05 The error code indicates that the card will not be accepted, and the cardholder needs to consult the customer service of the issuing bank for specific reasons.

3.06 The error code indicates that the issuing bank system is out of order, and the cardholder needs to wait for some time before swiping the card again.

4. The error code 19 indicates that the data read by swiping the card is incorrect, and the cardholder needs to swipe the card again.

The 5,20,21error code indicates that the cardholder needs to get in touch with the issuing bank and ask the specific reason.

6.23 The error code indicates that the transaction fee is unacceptable, the transaction funds are risky or the UnionPay agreement has not been signed.

7. Error code 25 indicates that the issuing bank has not found the relevant records, and the cardholder needs to check the relevant information to redo the transaction, or get in touch with the issuing bank.

8. Error code 39 indicates that the card swiping operation is wrong. If this error still occurs when swiping the card, you can try inserting or swiping the card.

9, 44 error code indicates that the card swiping operation is wrong, and the cardholder needs to determine whether the card swiping process and steps are correct.

Third, if the credit card transaction fails, it may be that the credit card is overdue, resulting in abnormality. Credit cards must be returned on time after use, and there can be no overdue situation. Because there will be penalty interest after the deadline, the longer the time, the more penalty interest, and the bank will collect it after the deadline. If the credit card is overdue, it will be uploaded to the credit information center, and the credit information will deteriorate, which will affect the continued use of subsequent credit cards.