1, yes, you can scribble, but it is not recommended. \x0d\2。 Strictly speaking, the signature on the purchase order must match the signature on the back of the credit card in order to be considered valid. Because credit cards are signed abroad, handwriting cannot be imitated and it is not easy to be used. The password is not. However, the merchants in our country are not strict in this respect, as long as they use the password pair, they can be regarded as successful consumption. \x0d\ For the sake of safety, you should sign carefully, and you'd better put your signature on the back of your credit card to avoid unnecessary trouble. \x0d\3。 The signature on the back of the credit card is to sign the full name to verify the consumption payment. \x0d\ Signature is the same as ID card name; \x0d\ and signing ceremony of the application form; \x0d\ For future consumption, please use a black ballpoint pen to sign \x0d\; \x0d\ Sign your name anywhere on the signature strip (generally 5cm) on the back of the credit card.