Mich. Comp. Laws § 14.308

Sec. 8. (1) An organization or professional fund-raiser which does not maintain an office within this state shall be subject to service of process by service upon its resident agent, or, if there is no resident agent, by service upon the person who has custody of the financial records as designated on the registration form. (2) If service cannot be made as provided in subsection (1), then service may be made as provided by law or court rule. (3) After service is effected by either subsection (1) or (2), a copy of the process shall be mailed to the last known address of the organization or professional fund-raiser.