The POS machine is abnormal and the credit card is not activated.

1. The POS machine is abnormal. Because the merchant's POS machine is abnormal, go to other stores to try it to see if it can be used normally.

2. The credit card is not activated. The information status of the overseas shopping credit card is abnormal. If the card used is a new card and it is not activated, the authentication will fail. You can activate it first and then use it.