Wis. Stat. § 865.13: Personal representative may pay claims.

The personal representative may pay in good faith just demands against the estate, whether filed as a claim or not, on or before the deadline for filing a claim under s. 859.01, or at any time with the consent of the heirs or beneficiaries affected by the payment. In paying a claim the personal representative may deduct any counterclaim which the estate has against the claimant. Any claim filed shall be allowed or disallowed according to ch. 859.