when using a credit card to swipe your card, you can only spend it after the authentication is successful. If the authentication fails, the payment cannot be completed.

there may be two reasons for the cardholder's failure in authentication. on the one hand, it is the reason for swiping the POS machine, and on the other hand, the status of the credit card itself is abnormal.

POS machine reasons: 1. at present, most pos machines of many merchants are dial-up connected, so if the network is disconnected or the signal is not good, it is impossible to conduct consumer authentication.

2. Some POS machines do not support certain special card transactions, such as World Cup Credit Card, Transformers 4 Credit Card and Olympic Dragon Card, which cannot be used on POS machines issued by ICBC.

Abnormal credit card status: There are many common abnormal credit card status, such as degaussing the card, inactivating the card, locking the password too many times, and the card exceeding the validity period, which will lead to the cardholder's authentication failure. This situation needs to be solved by contacting the customer service of the issuing bank.