2. Sign on the back of the card. When swiping a credit card, most merchants will compare the signatures at the back, and if the signatures are incorrect, they will refuse the transaction;
3, the formal channel to do the card. It is best to apply for a credit card at the bank, and don't enter your card number and personal information casually online;
4. Turn on the SMS reminder function. I found that I didn't call the bank customer service immediately when I was spending, and reported the loss in time;
5. Turn off the secret payment function. Or use a wallet with anti-NFC function to prevent malicious stealing.
6. If the credit card is unfortunately stolen. You should call the bank customer service staff to report the loss at the first time; At the same time, it can be used as strong evidence for stealing fake cards to conduct credit card transactions at nearby ATMs and merchants for the first time; Call the police as soon as possible, and contact the issuing bank or payment institution to actively cooperate with the police.