Mich. Comp. Laws § 455.18

Sec. 18. All corporations formed under the provisions of this act shall annually, between the months of March and the end of the succeeding August, make a report which shall state the amount of the capital stock actually paid in and the amount of money borrowed if any, which report shall be signed by a majority of the directors and verified by the oath of the president or secretary and be filed in the corporation and securities bureau of the department of commerce.