Wis. Stat. § 779.91: Discharge of lien.

(1) A prepaid maintenance lien is discharged by:

(a) Returning the amount of the prepayment to the customer who made the prepayment;

(b) The expiration of the time period for the performance of all contract or other obligations secured by the prepayment; or

(c) Lapse of the right to maintain an action.

(2) Upon discharge of a prepaid maintenance lien, any customer who filed the lien as permitted in s. 779.89 is subject to the requirements of s. 409.513.