Legal analysis: mainly proves the occurrence of legal acts. Lawyer's witness is a lawyer's rich legal professional knowledge in his special capacity. As a witness in the name of lawyer and law firm, he objectively and fairly proves some legal acts done by the parties from the perspective of a third party, which objectively makes the witnessed object true and legal and has certain authority. Therefore, when a dispute between the two parties causes a lawsuit, it can usually be used as evidence to find out the facts and determine the rights and obligations of both parties.

Legal basis: Article 86 of the Civil Procedure Law of People's Republic of China (PRC), if the addressee or his adult family members who live together refuse to accept the litigation documents, the addressee may invite representatives of relevant grass-roots organizations or units to be present to explain the situation, record the reasons and date of refusal on the service receipt, and leave the litigation documents at the addressee's residence, which shall be signed or sealed by the addressee and witnesses; You can also leave the litigation documents at the addressee's residence and record the delivery process by taking photos, videos, etc. , that is, as delivery.

Article 133 of the Criminal Procedure Law of People's Republic of China (PRC) shall be written in writing and signed or sealed by the participants and witnesses.