Mich. Comp. Laws § 456.7

Sec. 7. The person to whom the aforesaid warrant is directed shall, after having called said meeting, attach to said warrant a copy of the notice accompanied by his affidavit showing that it is a true copy of the notice posted up by him, and also showing when and where such notices were posted, and the same shall be presented to such meeting and filed by the clerk elected thereat.