The credit card prompts "invalid transaction". I suggest you check whether you have filled in the wrong personal information first. If the name is empty, the certificate type is wrong, the identity validity period expires, etc., it may lead to the failure of swiping the card. If the information is found to be wrong after verification, just adjust the error information in time. After the information is successfully adjusted and updated, the credit card can naturally be used normally.
After checking that the personal information is correct, further check whether there is any problem with the credit card status.
For example, if the credit card is overdue, the credit record is lost, or the credit card is demagnetized, it is normal to swipe the card to show that the transaction is invalid. Specifically, you can change a credit card that is still valid, and the degaussing card is replaced by a card that pays by scanning code, and generally you can swipe your card successfully.
In addition, the illegal use of credit cards has also been restricted by banks, such as freezing and stopping payment. In this case, swiping the card will also prompt an invalid transaction. It is more difficult to deal with the illegal use of credit cards because they cannot be swiped, and it is less likely for banks to resume using credit cards. It is really impossible to recover. It is recommended to return the card properly to save the subsequent deduction fee for sleeping.