Wis. Stat. § 812.43: Retaliation by garnishee for earnings garnishment forbidden.

Unless permitted under any applicable collective bargaining agreement, a garnishee shall not impose any fee or take any adverse action against a debtor by reason of the garnishment of the debtor’s earnings. If a garnishee violates this section, the debtor may bring an action for reinstatement, back wages and benefits, restoration of seniority, other relief allowed by law and reasonable attorney fees incurred in bringing this action.