Specifically, the CVV code is a short series of numbers printed on credit or debit cards, usually consisting of 3 or 4 digits. CVV is used to verify that the card user making the transaction is the cardholder, and also helps prevent fraud in online and telephone transactions.

Location: The CVV code is usually printed on the back of the credit card, above the signature strip. For American Express (AmEx) cards, this security code can be located on the front of the card and is four digits. Meanwhile, for other types of credit cards such as Visa, MasterCard or Discover, the CVV code is usually three digits.

Function of CVV ​​code:

1. Transaction authentication: When making transactions online or over the phone, in addition to entering card information such as card number and expiration date, the buyer must also enter the CVV code to complete the transaction. This helps to authenticate that the person using the card is the legitimate cardholder.

2. Fraud Prevention: The CVV code helps prevent credit card fraud. If someone only has the credit card number without the CVV code, they will have difficulty making online transactions.

3. Increased Security: The CVV code is an extra layer of security that helps protect your credit card information. Even if your card information is stolen, the lack of a CVV code can prevent fraudsters from making online transactions.

How to protect your credit card

1. Do not share the CVV code with anyone or store it in an accessible place.

2. Use secure websites: When making online transactions, only use secure, reputable websites.

3. Regularly check transactions on your credit card account to detect fraudulent transactions early.

4. Use additional authentication methods: Some banks offer additional authentication methods such as OTP (One-Time Password) codes to enhance the security of customer transactions.