Michigan Compiled Laws, Chapter 125. Planning, Housing and Zoning § 125.2609

Sec. 9. (1) If the governing body approves both the application to incorporate the corporation and the articles of incorporation, the clerk of the municipality shall file the original of the articles of incorporation with the department of commerce and 1 copy in his or her office after certifying that the copy is a true and accurate copy of the original articles of incorporation.

(2) The corporation is incorporated at the time the articles of incorporation are filed with the department of commerce. The validity of the incorporation shall be conclusively presumed unless challenged in a court of competent jurisdiction not more than 60 days after the incorporation.