Legal analysis: if someone else uses your signature without authorization, you don't have to bear the legal responsibility of signing, and the responsibility of signing is borne by the actual signer.

Legal basis: Article 169 of the Civil Code of People's Republic of China (PRC). If an agent needs to entrust a third party to act as an agent, it shall obtain the consent or ratification of the principal. If the entrusted agent is approved or ratified by the principal, the principal may directly instruct the entrusted third party on the agency affairs, and the agent is only responsible for the choice and instruction of the third party. If the entrusted agent is not approved or ratified by the principal, the agent shall be responsible for the behavior of the entrusted third party; However, in an emergency, in order to safeguard the interests of the principal, the agent needs to entrust a third party.