Mich. Comp. Laws § 129.101
Moneys on deposit in any duly designated depository to the credit of any account of the state of Michigan, when so authorized by resolution of the state administrative board, of any county, when so authorized by resolution of its board of supervisors or board of county auditors in those counties in which there is a board of county auditors, of any township, when so authorized by resolution of its township board, of any school district, when so authorized by resolution of its district board or board of education, of any city or village, when so authorized by resolution of its legislative body, or of any other municipal or public corporation within this state, when so authorized by resolution of its governing board, may be drawn upon by checks, drafts or other orders for the payment of money bearing, or purporting to bear, the facsimile signature or signatures of the person or persons required to sign the same; and when the drawing upon any such moneys in such manner is so authorized, such depository shall be entitled to honor and to charge the appropriate account for such checks, drafts and other orders regardless of by whom or by what means any such actual or purported facsimile signature may have been affixed thereto if, in the exercise of ordinary care, such signature would be honored by a bank as being the facsimile signature duly certified to the depository.
MCL 129.101