Mich. Comp. Laws § 213.125

Sec. 15. Motions for a new trial or to arrest the proceedings shall be made within 2 days after the rendition of the verdict unless further time is allowed by the court; and if no such motion is made, or being made is overruled, the court shall enter an order or judgment confirming the verdict of the jury; and such judgment of confirmation, unless reversed by the supreme court, shall be final and conclusive as to all persons interested therein.