Security code is very important card information. Some non-face-to-face transactions, such as online transactions and telephone authorization, can be completed through information such as card validity, security code and card number. So when using the card, you can cover it properly (to ensure that you can clearly identify this security code in the future) and try not to leave your sight.

In addition, we should also be careful not to erase the security code easily, because the security code is a card and only the cardholder knows it. Once you delete it and forget it, the bank can't inquire, so it can only change your card again.