Michigan Compiled Laws, Chapter 129. Public Funds § 129.207

Sec. 7. A claimant who has furnished labor or material in the prosecution of the work provided for in such contract in respect of which payment bond is furnished under the provisions of section 3,  1 and who has not been paid in full therefor before the expiration of a period of 90 days after the day on which the last of the labor was done or performed by him or material was furnished or supplied by him for which claim is made, may sue on the payment bond for the amount, or the balance thereof, unpaid at the time of institution of the civil action, prosecute such action to final judgment for the sum justly due him and have execution thereon. A claimant not having a direct contractual relationship with the principal contractor shall not have a right of action upon the payment bond unless (a) he has within 30 days after furnishing the first of such material or performing the first of such labor, served on the principal contractor a written notice, which shall inform the principal of the nature of the materials being furnished or to be furnished, or labor being performed or to be performed and identifying the party contracting for such labor or materials and the site for the performance of such labor or the delivery of such materials, and (b) he has given written notice to the principal contractor and the governmental unit involved within 90 days from the date on which the claimant performed the last of the labor or furnished or supplied the last of the material for which the claim is made, stating with substantial accuracy the amount claimed and the name of the party to whom the material was furnished or supplied or for whom the labor was done or performed. Each notice shall be served by mailing the same by certified mail, postage prepaid, in an envelope addressed to the principal contractor, the governmental unit involved, at any place at which said parties maintain a business or residence. The principal contractor shall not be required to make payment to a subcontractor of sums due from the subcontractor to parties performing labor or furnishing materials or supplies, except upon the receipt of the written orders of such parties to pay to the subcontractor the sums due such parties.