1, credit card security code, which is the security code of credit card in online or telephone transactions;
2. Generally, it is a 3-digit or 4-digit number printed on a credit card, and the printing position of different types of cards will be different;
It is usually used to prove that the payer has a credit card at the time of transaction, so as to prevent credit card fraud.
Extended data:
CCB Dragon IC Credit Card is a composite medium card with chip and magnetic stripe. When trading, priority is given to trading through chips. When the acceptance machine does not support chip trading or the chip trading fails, the transaction success rate can still be effectively guaranteed by magnetic stripe trading.
Contactless payment, expanding the scope of use. CCB Longka IC Credit Card has an electronic cash account, which supports both contact and non-contact chip information reading methods.
Electronic cash deposit enjoys interest-free treatment. The maximum amount of electronic cash account is RMB 65,438+0,000. Cardholders can deposit electronic cash accounts through CCB outlets, and enjoy an interest-free period when using credit cards.
Reference source: Baidu Encyclopedia: Building a bank card