Yes

If the information on the back of the credit card is lost, the merchant can refuse to swipe the card.

To use cards safely, firstly, protect your personal information and do not disclose your various information to people around you; secondly, it is best not to leave your sight during the whole process of swiping the card; thirdly, if you are psychologically concerned about this matter If the card is overburdened, you can stick it on with a patch, but it is not recommended to scrape it off. UnionPay has relevant regulations. If the security code is altered, the merchant may not recognize your card, and it will no longer be able to be used normally.