you can call the customer service phone of the issuing bank, and ask the customer service staff to inquire for you. Before the inquiry, the customer service staff should verify the identity of the caller, and then the inquiry can be made. However, this service is not provided by all banks, and some banks refuse to inquire in order to prevent information leakage.

CVV code:

that is, Card Verification Value, while Mastercard is called Card Validation Code (CVC).

VISA CVV and MC CVC are 3-digit or 4-digit numbers generated by card number, expiration date and service constraint code, which are generally written in the 2-track user-defined data area of card magnetic stripe. CVV and CVC are generated in the same way, but they are called differently. CVV2 is a number printed in the signature area of Visa/MasterCard card. It is located in the 3 digits after the credit card number. The last three digits we usually see on the back of a credit card are actually CVV2, not CVV code.

Safety tip:

1. Don't write credit card information on the computer;

2. Don't give your credit card to others easily;

3. After the credit card is lost, call the bank customer service immediately to report the loss;

4. Credit card is a payment and settlement tool based on the credit system. Therefore, please take your monthly statement seriously and confirm your consumption. If you find some abnormal consumption, you can refuse to pay as long as you provide evidence.

5. If you think it is dangerous to inform the credit card number, expiration date and other information, I suggest you use online payment, because online payment will