Legal analysis: official documents should be signed as informal documents, from low to high. Generally, the low-level signature is in the lower right of the title of the home page, and the high-level signature is in the upper left or upper right of the title of the home page. Low-level signatures should not be allowed to sign in these two places as far as possible.

Informal document signing, according to the level, from low to high. Generally, the low-level signature is at the lower right of the title of the first page, and the high-level signature is at the upper left or upper right of the title of the first page. Try not to sign the low-level signature in these two positions.

Invoice signature, according to the format column specified in the invoice, generally the low-level signature is at the bottom, and the signature position can be increased in turn;

No matter from top to bottom, from left to right, or from right to left, we should follow the hierarchical order so that people can see it at a glance and leave enough signature positions to show respect for the last leader.

Legal basis: Article 490 of the Civil Code of People's Republic of China (PRC). If the parties enter into a contract in the form of a contract, the contract shall be established when the parties sign, seal or press their fingerprints. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it.

A contract shall be concluded in written form as stipulated by laws, administrative regulations or agreed by the parties. If the parties do not do this in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.