Wis. Stat. § 865.18

Unless barred by adjudication and except as provided in the closing statement, the rights of interested persons and of creditors whose claims have not otherwise been barred against the personal representative for breach of fiduciary duty are barred unless a proceeding to assert the same is commenced within 6 months after the filing of the closing statement. Rights thus barred do not include recovery for fraud, misrepresentation, or inadequate disclosure related to the settlement of the decedent’s estate.