Code of Civil Procedure Article 149

The court from which the action is pending may, on motion, permit constructive service upon the party in the following circumstances:(1) Where the location of whom to serve is unknown;(2) Where the service is ineffective on a person who enjoys immunity in his/her domicile, residence or office;(3) Where the service to be made in a foreign country cannot be effectuated in accordance with the provision of Article 145, or where service is deemed foreseeably invalid even if it has been implemented in accordance with said Article .An interlocutory appeal may be taken against a ruling denying the motion provided in the preceding paragraph.When no person moves for service by constructive notice in the cases prescribed in the first paragraph, the court in which the action is pending may on its own initiative order service to be effectuated by constructive notice if it considers it necessary to do so for avoidance of delay.Where the plaintiff or the defendant who has been served previously fails to notify the court in which the action is pending of the change of the place where he/she can be served and such failure results in the situation provided in the first subparagraph of the first paragraph, the court may, on its own initiative, order service to be effectuated by constructive notice.Where the plaintiff, movant, or appellant fails to appoint an agent of service pursuant to the second paragraph of Article 133, the court may, at its own discretion, order the service to be effectuated by constructive notice.