Wis. Stat. § 863.07
If any person interested in an estate assigns all or part of his or her interest in the estate, other than an interest not assignable by the specific language of the will, as collateral or otherwise and the assignee serves a copy of the assignment on the personal representative of the estate and files a copy with the court in which the estate is being administered before the entry of the final judgment and before the property or interest covered by the assignment has been distributed under s. 863.01, the court shall assign to the assignee in the final judgment the interest or part of the interest of the assignor included within the assignment to the extent that the assignment is valid as determined by the court, after giving effect to any credits to which the assignor may prove himself or herself entitled. A personal representative incurs no liability to an assignee of a person interested for any acts performed or distribution made by the personal representative prior to the time a copy of the assignment is received by the personal representative or he or she has actual knowledge of the assignment.
Wis. Stat. § 863.07