You can refer to the relevant provisions of the Civil Procedure Law on service: 1. The service of litigation documents to legal persons and other organizations shall be signed or sealed by the legal representative of the legal person, the main person in charge of the organization or the person in charge of the office, mail room and duty room. , or the recipient; Refuse to sign or seal, as served; Second, the addressee refuses to accept the litigation documents, and the representatives of the relevant grass-roots organizations or units and their witnesses are unwilling to sign or seal the service receipt. If the addressee notes the situation on the service receipt and leaves the service documents at the addressee's residence, it is deemed to have been served; 3. If the addressee has an agent ad litem, the people's court may serve it on the addressee or his agent. If the addressee is an agent ad litem and the agent is an agent, it shall be served by lien; The conciliation statement shall be served directly on the parties, and shall not be retained. If the parties are unable to sign for it for some reason, they may sign for it by their designated agents. 4. If it is delivered by post, a receipt shall be attached. The date of receipt indicated on the receipt of registered letter is the date of receipt. If the date of receipt indicated on the receipt is inconsistent, or the receipt is not sent back, the date of receipt indicated on the receipt of registered letter shall be the date of delivery. Five, commissioned by other people's courts, the entrusting court shall issue a power of attorney, and attach the litigation documents to be served and the service receipt, with the date of receipt by the addressee as the service date; Six, the service of litigation documents handed over to the relevant units, the date of receipt of the service as the date of delivery; Seven, after the announcement is served, it can be posted on the bulletin board of the people's court, the original residence of the recipient, or published in the newspaper. If there are special requirements for the delivery method of the announcement, the announcement shall be made in the required way. Upon the expiration of the announcement, it shall be deemed to have been delivered; There is no "necessary" unit leader signature in the above provisions.