Michigan Compiled Laws, Chapter 600. Revised Judicature Act of 1961 § 600.1972

Sec. 1972. Whenever service of papers subsequent to the original complaint cannot reasonably be made because of lack of an attorney of record or the inability to find a party or for any other reason, the court in which the action is pending, for cause shown on ex parte application, may direct in what manner and upon whom service may be made.