The credit card verification code is the 3-digit number after the signature field on the back of the card. It is also a security code.

Credit card verification code, abbreviated in English as CVC (full name CardVerificationCode), is an additional code printed on the back of the credit card. It is also called CVV (CardVerificationValue), which is the credit card verification value, and some are also called CID, which is the credit card security code or Personal security code, etc. This verification code is not the password of the credit card, but is the voucher for each credit card to verify card transactions. The CVV code is displayed on the back of the credit card. The top end of the signature is displayed in italics. The first four digits are the card number, and the last three digits are is the verification code.

Credit card online payment is a kind of "no card and no secret payment", so you only need to provide the card number and the three-digit verification code (CVV, also known as the "last three digits") on the back of the credit card to complete the payment. , therefore, in order to ensure the safety of your own property, you must protect your credit card and never lend it to others.