In the current ordinary invoice, the first record is white, the second record is red, the third record is yellow, and the fourth record is cyan.

The first white form is for customers to sign, which can play a certain legal role, because it is not a copy of the form. It depends on the actual situation in your place. Generally, the first copy and the handwritten copy are stub copies, which are kept by the billing unit. The delivery will bring two lists, which will be signed by the other party when receiving the goods. The copy of the signer's name will be left to the other party, and the handwritten signature will be left to yourself. Later, the checkout will be based on this document.