Wis. Stat. § 32.15
In case any title or interest in real estate lawfully required by any person having the power of condemnation is vested in any trustee not authorized to sell, release and convey the same or in any minor or person adjudged mentally incompetent, the circuit court may in a summary proceeding authorize and empower such trustee or the general guardian of such minor or person adjudged mentally incompetent to sell and convey the same for the purposes required on such terms as may be just. If such minor or person adjudged mentally incompetent has no general guardian, the court may appoint a special guardian for such sale, release or conveyance. The court may require from such trustee, or general or special guardian, such security as it deems proper before any conveyance or release authorized in this section is executed. The terms of the same shall be reported to the court on oath. If the court is satisfied that such terms are just to the party interested in such real estate, it shall confirm the report and direct the conveyance or release to be executed. Such conveyance or release shall have the same effect as if executed by one having legal power to sell and convey the land.
Wis. Stat. § 32.15