It is normal for the number 3 on the back to leak out, and anyone who takes it can see it. As long as your card has a password and no one else knows it, it's fine.

1) Do not write credit card information on the computer;

2) Do not give your credit card to others easily;

3) After losing your credit card, immediately Call the bank customer service number to report the loss;

4) Credit card is a payment and settlement tool based on the credit system, so please take the monthly statement seriously and confirm your consumption. If you find something Abnormal consumption can be refused as long as evidence is provided.

CVV code

5) If you think it is dangerous to inform your credit card number, expiration date and other information, it is recommended that you use online payment methods to pay, because online payment methods will... Credit card information is entered in the bank's online banking, and all information is not retained in the hands of the merchant.

In order to prevent the increasing number of crimes of stealing credit card information, major banks have given specific tips to card owners. For example, a bank emphasized in a letter sent to credit card owners: Credit card number, expiration date and other information are important documents for transactions. Please keep your personal information such as card number and expiration date properly, and do not share credit card related information with others. Some banks also remind: When applying for a credit card with copies of your personal identity document and relevant supporting documents, you can indicate the purpose of use in a prominent position, such as "Only used to apply for ×× bank credit card, copies are invalid" to prevent the information from being used for other purposes. use.