16 on the front of the credit card is the card number of the credit card, and the validity period of the credit card is below the card number. Generally, it will display: validthru 09/ 12, indicating that the card will expire on September 20 12 (24: 00 on the 30th). It should be noted that the validity period should be well protected, and it is not easy to tell others, because it may be used when binding the payment platform or credit card online payment, and the risk of theft will increase once it is leaked. Further down the validity period is the cardholder's name pinyin.
On the back of the credit card, there are seven digits behind the signature column. The first four digits of these seven digits are the last four digits of your card number, and the last three digits are the security code. CVV, the card verification value, is a check code used for authentication.
The last three digits on the back of a credit card (hereinafter referred to as "the last three digits") are used to confirm whether the cardholder himself is trading, and their importance is almost equal to the password. At present, many large domestic airlines, travel booking websites and hotel websites need to use the "last three yards" when using credit cards to pay. Experts remind that if the credit card does not involve large transactions, it is best to set a credit card limit to prevent the card from being stolen and causing losses.
Credit card expiration date and security code are important credit card information, but these information are obviously printed on the credit card, so we should pay great attention to protecting the information on our bank card and the digital information when swiping the card. For the security code, we can cover it with tape to avoid exposure and leakage. In a word, the information on the credit card is very important. We should not only understand the meaning of digital information on credit cards, but also protect the digital information on credit cards.