Legal analysis: the promisor needs to write his own name when signing. In entrustment contracts and bank-level contracts, the trustee may sign on behalf of the principal or directly by the principal. In order to avoid disputes in civil activities, even if the agent signs on behalf of the principal, in his own name or in the name of the principal, it should be signed by the principal for confirmation unless a clear power of attorney is issued in advance.

Legal basis: Article 161 of the Civil Law of People's Republic of China (PRC), a civil subject may carry out a civil juristic act through an agent. In accordance with the provisions of the law, the agreement of the parties or the nature of civil legal acts, civil legal acts that should be implemented by themselves shall not be represented.