Wis. Stat. § 214.84
On the date the division takes custody of a savings bank, the division shall provide by 1st class mail a written notice of that action to the president or secretary and to 2 or more directors of the savings bank or to 2 or more of the trustees of any trust or to 2 or more of the liquidators if the savings bank is in liquidation. If the parties receiving notice believe the division does not have authority to take custody, the savings bank, the directors or officers of the savings bank or the trustees or liquidators, within 20 days after the mailing of the notice, or within further periods of time as the division may extend up to an additional 60 days, may file a complaint in the circuit court of the county in which the savings bank is located to enjoin custody. The court shall require the division to show cause why custody should not be enjoined. If, upon hearing, the court finds that grounds do not exist for the division's custody, it may enter an order enjoining further custody.
Wis. Stat. § 214.84