The number on the back of the credit card is the credit card security code.

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

The main purpose of the credit card security code

The credit card security code is equivalent to the credit card's ID card. We can use this code to conduct consumer transactions. Shopping on overseas websites does not require a password. As long as the buyer provides an account number and security code, the transaction can be completed. In China, there are also merchants that have signed contracts with banks to complete phone transfers without a credit card password and only with a security code.

So everyone must keep their credit cards safe and keep them out of their sight when making purchases to avoid others remembering your credit card account number and security code.

Extended information

You cannot tell others the last three digits of your credit card easily

In the context of China becoming the second largest economy in the world, the number of Chinese people applying for credit cards , it is common for those who go abroad to spend money. However, when many people return home from vacation, they receive a text message like a fly: You just spent XX yuan by swiping your card in a certain country. This often takes away the mental pleasure of saving money when shopping overseas.

Stuck in the pocket, people have returned home, but overseas consumption has occurred. This situation does not only occur to people who have been to "Southeast Asia", even if they have swiped their cards in the "relatively safe" United States, some people's credit cards have been stolen. What's more, some people have never left the country, and their credit cards were swiped in a country tens of thousands of kilometers away.

Although there are no authoritative statistics, the number of Chinese credit cards being stolen overseas every year must be massive. Baidu searches for "overseas credit card fraud" and there are more than 2 million related content. The Tieba forum Weibo was filled with all kinds of complaints, so much so that an insurance company launched “credit card fraud insurance” at the right time.

The convenience and speed of swiping a credit card, the hassle and time-consuming process of defending rights after fraudulent use, and the huge gap that only needs to be experienced once are enough to make people want to give up on credit cards. How to prevent fraudulent transactions has become a required course for cardholders. Based on many cases, it has been found that credit cards have been stolen overseas due to factors such as the thief's "smartness", the bank's failure to inform the bank, and the cardholder's insufficient understanding of credit card expertise.

Media reported that an online shopper received a refund reminder from the seller and was asked to provide: credit card number, expiration date, and three numbers on the back of the card (the last three digits). Not long after sending the above information, he received a text message prompting him to use his credit card for overseas purchases.

Generally speaking, when using a credit card in China, you need to enter a password, and the "last three digits" are almost never used. However, when shopping abroad or on overseas websites, you only need the card number, expiration date, and last three digits to make a transaction. The "last three codes" cannot be disclosed to others, otherwise they will be easily "cloned" and stolen. Many people do not understand this common sense.

With the “magic heights rising,” new cases of fraudulent fraud will continue to appear, which requires banks to improve their anti-theft skills and inform users in a timely manner. At present, when making bank transfers, we are familiar with the voice prompts to prevent fraud, but the informative tips to prevent credit card theft are still not in place - a friend has multiple credit cards from multiple banks and almost never receives any proactive advice from the bank. hint.

Reference material: ifeng.com - Do not tell others the last three digits of your credit card easily

Reference material: Baidu Encyclopedia - Credit card security code