The so-called invalid credit card usually refers to automatic cancellation after expiration, but in fact the account still exists in the banking system. Invalid credit card banks always ask people to cut their cards, because it is easy to read the information on the cards, including passwords, by copying and cloning. Only cutting off the magnetic stripe can prevent it. You know, credit card accounts are different from ordinary savings card accounts, and cards are not recognized. In other words, no matter how many credit cards in the same bank are handled under the name of the same person's ID card, they all share information. As long as you know the key information of the cardholder, you can use other normal credit cards under the ID card name/