Wis. Stat. § 779.30
The filing of an affidavit under s. 779.29 shall not stay execution unless the intervenor files an undertaking, with 2 or more sureties, who shall each justify in a sum equal to double the amount of the judgment, conditioned that if the plaintiff establishes the right to a lien on the property they will pay the amount of judgment in the plaintiff's favor with costs; the undertaking shall be approved by the judge of the court; and upon filing it all proceedings upon the judgment shall be stayed during the pendency of the proceedings. If execution has been previously issued the same shall, upon presenting to the officer in whose custody it may be a certified copy of the affidavit and undertaking, be returned, and all property in which the intervenor claims an interest that may have been levied upon shall be released from the levy. If upon the trial the plaintiff recovers judgment of lien upon this property the judgment may be entered against the intervenor and sureties; but if the plaintiff does not establish the right to a lien the intervenor shall recover judgment for costs.
Wis. Stat. § 779.30