1. Sign your name if you have a legal power of attorney or a legal power of attorney;

2. If there is no power of attorney, no one's name will take effect. If there is no right to establish an agent by estoppel, the client must ratify it;

3. When an agent signs a contract with a third party in his own name within the scope of authorization, he shall sign his own name.

Signing a contract on behalf of others can express the handling process of the matters entrusted by the contract, and it needs to be approved.

The following documents are required to sign the contract:

1, the identity certificate of the agent;

2. The identity certificate of the client;

3. Power of attorney and other materials required for signing the contract.

Generally, an agent must have a power of attorney when signing a contract, and specify the agency authority, agency scope and other matters. Signing a contract on behalf of others means signing a contract on behalf of others, which is legally divided into signing a contract on behalf of a natural person and signing a contract on behalf of a legal person. There are two main forms of entrustment, namely written form and oral form.

Legal basis: Article 503 of the Civil Code of People's Republic of China (PRC).

Where an unauthorized agent concludes a contract in the name of the principal, and the principal has started to perform the contractual obligations or accepted the performance of the other party, it shall be regarded as ratification of the contract.

Article 504

Unless the other party knows or should know that the legal representative of a legal person or the person in charge of an unincorporated organization has exceeded his authority, the representative's behavior is valid and the contract concluded is valid for the legal person or unincorporated organization.