Mich. Comp. Laws § 600.1913: Process; substituted service.

Sec. 1913.

Service of process may be made,

upon an individual nonresident defendant having any of the contacts, ties or relations with this state as specified in chapter 7 of this act, by service of a summons and a copy of the complaint upon such agent, employee, representative, salesman or servant of the defendant as may be found within the state, and by sending a summons and a copy of the complaint by registered mail addressed to the defendant at his last known address.

upon an infant defendant, by leaving a summons and a copy of the complaint with a person having the care and control of him with whom he resides, or with his legal guardian, or

upon a defendant who has been judicially declared incompetent and for whom a guardian has been appointed and is acting, by leaving a summons and a copy of the complaint with the guardian.

If the individual defendant is in a state institution a copy of the complaint shall also be mailed to the attorney general.