Credit cards are an indispensable consumption tool in today's society. There is a mysterious number on the credit card, which is a security code. So what is the security code for a credit card? What's the use?

1. Credit card security code

The credit card security code is the security code used by credit cards when conducting online or telephone transactions. It is usually a 3-digit or 4-digit number printed on a credit card. The printing position will be different for different types of cards. It is often used to prevent credit card fraud by proving that the payer owned the credit card at the time of the transaction.

VISA's security code is called CVV2 (Card Verification Value 2), which is a 3-digit number printed on the signature field on the back of the credit card and is the last 4 digits of the card number.

MarsterCard’s security code is called CVC2 (Card Verification Code 2), which is a 3-digit number printed on the last 4 digits on the back of the credit card.

The security code of the Discover card is called Cardmember ID, which is a 3-digit number printed on the signature line on the back of the credit card.

American Express's security code is called a CID (Card Identification Number), which is a four-digit number printed on the front of the credit card number.

The security code for UnionPay cards (China UnionPay) is called CVN2 (Card Verification Number 2), which has three digits and is printed on the back of the credit card after the last four digits of the card number in the signature line.

The security code of the JCB card (Japan Credit Bureau) is called CAV2 (Card Authentication Value 2). It has 3 digits and is printed on the last 4 digits of the signature field on the back of the credit card.

2. Use of credit card security code

The security code of a credit card is equivalent to the credit card’s ID card. We can use this code to conduct consumer transactions. No password is required for shopping on overseas websites. As long as the buyer provides the account number and security code, the transaction can be completed. In China, there are also merchants and banks that sign contracts, but you don’t need a credit card password, you just need to pass the anti-counterfeiting code to complete the transfer over the phone. Therefore, everyone must take good care of their credit cards and do not let them out of their sight when making purchases to prevent others from remembering your credit card account number and security code.

Third, how to protect the security code from being leaked

1. Block the security code when swiping the card.

In some transaction scenarios, payment can be completed with the credit card number, expiration date and security code, so the cardholder should remember the security code and cover it with opaque tape to avoid prying eyes.

2. When swiping the card, the card will not leave your hand.

When using a credit card to check out, be sure to swipe the card in front of the POS machine and put it back into the wallet immediately after swiping to prevent the credit card from falling into the hands of others and causing information leakage.

3. Traceless overseas shopping

Many overseas shopping websites support credit card payment, and you can pay easily by entering relevant credit card information. Therefore, do not save your credit card information when making a payment, and enter the information manually each time to reduce the risk of credit card theft.

4. Keep a low profile and hide it

Whether you have a gold card, diamond card or black card, it is best not to display it on social networking sites, especially the anti-counterfeiting code. Once your security code is seen by someone else, your credit card no longer belongs to you. I really want to show off my strength. Remember to give P your credit card number, name, expiration date and security code first. Related Q&A: Related Q&A: I lost my credit card, how do I check the security code?

What is the security code for a credit card?

It is the 7-digit (or 8-digit) bold number on the credit card. The first four digits are the last digit of the bank card number, and the three digits after the space are the security code (usually in italic font).

Where is the credit card security code?

The security codes of cards issued by these four major card organizations, UnionPay, JCB, MasterCard, and VISA, are printed on the last three digits on the signature line on the back of the credit card, usually in italics; American Express card security code It is the 4-digit number printed on the front of the card, above the card number.

What is the use of the credit card security code?

The security code is the "second ID card" of the credit card. When performing off-site transactions (such as online and telephone), the cardholder does not need a password and only needs to provide the card number, validity period, and security code to complete the transaction. trade.

If I lose my security code, can I call the bank customer service to get it back?

Only the cardholder knows the credit card security code. Others, including the bank, usually do not know it, so it is generally not possible to find it by calling the bank's customer service number.

What should I do if the security code is blurry?

If the security code is blurred and indistinguishable due to improper use or other reasons, you can cover it with a thin piece of white paper and slowly smear it on the corresponding position, and it will usually be visible. If it is painted in such a way that it cannot be displayed. Then you can only apply to the card issuing bank to change the card, cancel the original card and apply for a new card. The security code of the new card will be the same as the original one.

Finally, a reminder that the security code is almost as important as the password, so keep it confidential in daily use.