According to Article 7 of People's Republic of China (PRC) Negotiable Instruments Law, the signature on a negotiable instrument is signature, seal or both.

The signature of the legal person or other organization that uses the bill shall be the signature of the legal person or other organization plus the signature of its legal representative or its authorized agent. The signature on a bill of exchange shall be the real name of the party concerned.

According to the nature of signature, it can be divided into legal person signature and natural person signature.

Signature of legal person: generally, official documents are only stamped with the corporate seal (official seal) at the end of the official document; Some official documents involving the responsibility of the legal representative must have the name and official seal of the unit, as well as the signature and private seal of the legal representative.

The signature of a natural person shall be personally signed in the name column of the document, and the private seal of the party concerned shall be affixed.

According to Article 5 of People's Republic of China (PRC) Negotiable Instruments Law, the parties to a bill may entrust an agent to sign the bill, and shall indicate the agency relationship on the bill.

If the signer signs the bill in the name of an agent without a power of attorney, the signer shall bear the bill liability; Where an agent exceeds the agency authority, he shall bear the bill liability for the part beyond the authority.

The above resources come from China People's Congress Network-People's Republic of China (PRC) and Bill Law, China.