Legal analysis: imitation of customer's signature should bear corresponding legal responsibility. Signature has legal effect. If false receipts and contracts are used, it constitutes fraud. If it is used to make perjury, it constitutes perjury. If it is used to forge government documents, the circumstances are even more serious. However, if the customer knows that someone else has signed on his behalf and does not deny it, or has ratified it, the signature is binding on me and I shall bear legal responsibility.

Legal basis: Article 66 of the Civil Law of People's Republic of China (PRC) has no agency right, exceeds the agency right or acts after the agency right is terminated. Only after being ratified by the agent can he bear civil liability. If the act is not ratified, the actor shall bear civil liability.