Hello, the signature strip on the credit card is specially designed to prevent others from altering the original cardholder's name after stealing the card: first, it is very thin; second, it is easy to break the hole and change color as long as it is stained with chemicals, and the word "invalid" is exposed at the bottom. So if the signature is wrong, you can't change it with chemicals.

If there is something wrong with the signature, you can cross out the original one (if it is not completely covered, just cross it out) and re-sign it next to the signature column. In this case, it's best to shop with your ID card-especially when you spend a lot of money, so as not to ask for identification.