Mich. Comp. Laws § 700.3811: Counterclaims.

Sec. 3811.

In allowing a claim, the personal representative may deduct a counterclaim that the estate has against the claimant. In determining a claim against an estate, the court shall reduce the amount allowed by the amount of a counterclaim and, if counterclaims exceed the claim, render a judgment against the claimant in the excess amount. A counterclaim, liquidated or unliquidated, may arise from a transaction other than that upon which the claim is based. A counterclaim may give rise to relief exceeding in amount or different in kind from that sought in the claim.