Legal analysis: The mediation letter shall be signed by the judge and the clerk, stamped with the seal of the People's Court, and served to both parties. The mediation document becomes legally binding after it is signed by both parties. For agreements that do not require the preparation of a mediation document, they should be recorded in the transcript and become legally effective after being signed or sealed by both parties, the adjudicator, and the clerk.

Legal basis: "Civil Procedure Law of the People's Republic of China" Article 89 When an agreement is reached through mediation, the People's Court shall prepare a mediation letter. The mediation letter shall state the litigation claims, the facts of the case and the mediation results. The mediation document shall be signed by the judge and the clerk, stamped with the seal of the People's Court, and served to both parties. The mediation document becomes legally binding after it is signed by both parties.