This is the CVV2 verification code of credit card, which is used when the bank card is used for indirect credit card consumption, such as online payment and other transactions. The CVV2 verification code is generally the last three digits of the seven-digit signature column on the back of the credit card, which will change every time the credit card is replaced.

If the verification code is ambiguous, you can cover it here with white paper and draw it repeatedly to display these three digits.

If you enter the wrong CVV2 verification code for many times, the credit card will be locked and resumed the next day. This verification code can only be viewed by the credit card customer's own card.