'Service by public announcement' is a method of service that is carried out at the request of a party or by the court ex officio when it is impossible to serve documents to the other party by the usual method for reasons such as not knowing the other party's address or place of work. It is a service method that allows the other party to be served at any time by keeping the documents to be served by a court officer, etc. and posting the reason on the court bulletin board, publishing it in the official gazette, gazette, or newspaper, or publicizing it using electronic communication media.

If you do not know the address of the other party in the divorce suit and would like to request service by public notice from the court, you must prepare the following documents and submit them to the family court where the divorce suit was filed.

• 1. Application for public notice delivery
• 2. Materials that show that the current address of the other party is unknown, such as a copy of the canceled resident registration, a non-residence confirmation from the head or class leader of the last address, and a confirmation of unknown whereabouts written by the other party's relatives (parents, brothers, sisters, etc.)

In addition to the request of the parties, the court may, ex officio, effect service by public notice. In cases where it is impossible to expect a party to request service by public notice or when it is necessary to prevent litigation delays, the court executes service by public notice ex officio.

Service by public notice may be made several times depending on the progress of the lawsuit, including delivery of a copy of the complaint and attendance notice.

At this time, the first service by public notice takes effect two weeks after the date of service by public notice, and subsequent service by public notice to the same party takes effect the day after service by public notice is made (Article 196 of the Civil Procedure Act), and trial procedures proceed.