If it is delivered by post, it will be deemed as delivered without receipt. Service by post refers to the act of the people's court serving litigation documents to the parties and other litigation participants by mail. A method of service adopted by the court of appeal when it is difficult to serve litigation documents directly. The people's court shall send the relevant litigation documents to the post office by registered mail, with the receipt of registered mail as the proof of delivery and the date of receipt indicated on the receipt as the date of delivery. If a party residing in a foreign country is served by mail, it shall be on the premise that the country of residence does not object to the service by mail. The service receipt has not been returned after 6 months from the date of mailing, but if it is deemed to have been served according to various circumstances, it shall be deemed that the service period has expired.

Delivery methods mainly include:

1, direct delivery. Direct service, also known as service, refers to the way that the people's court sends a special person to directly serve the litigation documents to the addressee for signature. Direct delivery is the most basic delivery method;

2, lien service, refers to the addressee unreasonably refused to serve the litigation documents, the addressee shall put the litigation documents in the addressee's residence and produce the legal effect of service;

3. Entrusted service means that when the people's court in charge of hearing civil cases has difficulty in directly serving litigation documents, it entrusts other people's courts to serve them on its behalf according to law. Entrusted service and direct service have the same legal effect;

4. Delivery by post means that the people's court sends the documents served to the addressee by registered mail through the post office. Practice shows that when the addressee's residence is far away from the court and it is difficult to deliver it directly, the court usually uses postal service as the mode of delivery.

5. Transfer service refers to the way in which the people's court sends the litigation documents to the addressee's work unit for collection and then forwards them to the addressee;

6, electronic service, refers to the court by fax, email, mobile communication and other modern electronic means of service;

7. Notice service refers to the way that the court issues an announcement when the whereabouts of the addressee are unknown or cannot be served by other means, and the announcement is deemed to be served after a certain period of time.

Legal basis:

Article 11 of "Provisions of the Supreme People's Court on Court Express Service of Civil Litigation Documents" states that if the service address provided or confirmed by the addressee himself is inaccurate, he refuses to provide the service address, or fails to inform the people's court of the change of the service address in time, or the addressee himself or the agent designated by the addressee refuses to sign for it, the date when the litigation document is returned shall be regarded as the service date. If the addressee can prove that he is not at fault in the process of serving the litigation documents, the provisions of the preceding paragraph shall not apply.