You can log out. Any special card that can provide the cardholder with a credit certificate, and the cardholder can use the card to shop, consume or enjoy specific services can be called a credit card. After the user applies for a credit card and sends something to the bank, he can indeed cancel the card. Yes, after all, the bank does not impose a time limit on users to cancel the card. If the card has been activated and used, the bill needs to be paid in full before the card can be canceled.