Legal analysis: 1. The seal of legal representative is used by companies, including companies and unincorporated units, and it is inseparable from the seal in foreign exchanges. The seals of banks and other units are closely related to the company's business. This seal should be printed on all checks, including this unit. 2. The main user of the signature seal is an individual, that is, a personal seal, which is generally irrelevant to the company's business. That is, the name of the party or the name of the unit is stamped. 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. 3. In addition, the legal representative himself can own these two kinds of seals, but the purposes are different.

Legal basis: Article 7 of People's Republic of China (PRC) Negotiable Instruments Law (adopted at the 13th meeting of the Standing Committee of the Eighth NPC in May 2005 1995) refers to 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.