First of all, CVV2 security code is the last three digits behind the signature column on the back of the credit card.
The UnionPay standard card organized by UnionPay is called CVN2, MasterCard is called CVC2, VISA is called CVV2, and AE American Express is called CSC2.
The principles of generating verification codes corresponding to the four names CVV2, CVC2, CVN2 and CSC2 are all the same, but the names of different institutions are different.
Second, CVV2 code is also called credit card security code.
This is the security code for credit card transactions. Usually printed on the back of the credit card after the signature, that is, the last 3 digits in italics.
According to bank security experts, the three CVV2 codes behind the credit card are the security codes for online or telephone transactions. It is usually used to confirm that the payer does hold a credit card at the time of transaction.
Because some websites, especially overseas websites, do not need a password when paying by credit card online, they only need the card number, expiration date and CVV2 code to complete the transaction, so the importance of CVV2 code is almost equal to the password.
3. The method of reporting the loss of credit card is as follows:
1, call the customer service hotline of the issuing bank, and then report the loss according to the voice prompt;
2. Bring my ID card to the business hall of the issuing bank branch to report the loss;
3. Log in to the credit card app to report the loss of the credit card;
It takes about 15 days to reissue a lost credit card. In the meantime, users need to pay back the money, or pay it back on time. The arrears can be returned to the old card through online banking, bank counters and third-party payment platforms, and the new card will be returned after activation.
It is suggested that cardholders can cut a small piece of adhesive tape and affix CVV2 code to prevent leakage.
At the same time, you should also protect your credit card in an all-round way: try to ensure that the card doesn't leave your body, don't let the credit card leave your sight when you consume, and don't give the card to the clerk to check out, so as to avoid the information in the card being viewed by outsiders.