Wis. Stat. § 185.75: Unclaimed assets.

(1) Assets distributable in the course of the liquidation of a cooperative that remain unclaimed after 2 years may be forfeited to the cooperative in the manner set forth in s. 185.03 (10), except that the board, a committee designated to liquidate the assets under s. 185.71, a court, trustee or other person authorized to liquidate the assets of the cooperative may declare the funds forfeited, give the notice, determine the purpose or purposes and dedicate the funds under s. 185.03 (10) and except that any of these persons may declare the funds forfeited no earlier than 2 years and no later than 5 years after the funds are first made available to their owners in the course of the liquidation of the cooperative.

(2) Assets distributable in the course of the liquidation of a cooperative that remain unclaimed after one year may be reported and delivered to the secretary of revenue as provided under ch. 177. Assets distributable in the course of the liquidation of a cooperative that are not forfeited under sub. (1) and that remain unclaimed after 5 years shall be reported and delivered to the secretary of revenue under ch. 177.