Wis. Stat. § 103.455
No employer may make any deduction from the wages due or earned by any employee, who is not an independent contractor, for defective or faulty workmanship, lost or stolen property or damage to property, unless the employee authorizes the employer in writing to make that deduction or unless the employer and a representative designated by the employee determine that the defective or faulty workmanship, loss, theft or damage is due to the employee's negligence, carelessness, or willful and intentional conduct, or unless the employee is found guilty or held liable in a court of competent jurisdiction by reason of that negligence, carelessness, or willful and intentional conduct. If any deduction is made or credit taken by any employer that is not in accordance with this section, the employer shall be liable for twice the amount of the deduction or credit taken in a civil action brought by the employee. Any agreement entered into between an employer and employee that is contrary to this section shall be void. In case of a disagreement between the 2 parties, the department shall be the 3rd determining party, subject to any appeal to the court. Section 111.322(2m) applies to discharge and other discriminatory acts arising in connection with any proceeding to recover a deduction under this section.
Wis. Stat. § 103.455
The consent of the employee may only serve as a basis for a deduction if it is given in writing after the loss and before the deduction. Donovan v. Schlesner, 72 Wis. 2d 74, 240 N.W.2d 135 (1976). Termination of an employee-at-will may violate the public policy underlying this section. Wandry v. Bull's Eye Credit, 129 Wis. 2d 37, 384 N.W.2d 325 (1986). Commissions earned over and above a salary are wages under this section. The 6-year statute of limitations, under s. 893.43, applicable to claims for commissions applies to the recovery of deductions from commissions under this section. A claimant need not first bring a claim before DILHR if the employer has never given the employee an opportunity to contest the deductions. Erdman v. Jovoco, Inc. 181 Wis. 2d 736, 512 N.W.2d 487 (1994). The exception to the at-will employment doctrine, founded on well-defined public policy found in this section, does not reach every potential deduction by an employer from an employee's wages. Batteries Plus, LLC v. Mohr, 2001 WI 80, 244 Wis. 2d 559, 628 N.W.2d 364, 99-1319. This section necessarily creates a separate and distinct claim from simple breach of contract, and it must be pled as such. Wolnak v. Cardiovascular & Thoracic Surgeons of Central Wisconsin, S.C. 2005 WI App 217, 287 Wis. 2d 560, 706 N.W.2d 667, 04-1051. Once an employee earns wages, this section protects that employee from having the employer deduct those earned wages on charges that the employee was responsible for defective or faulty workmanship, or lost or stolen property or damaged property unless one of 3 things occurs. The public policy goal of the statute is to prevent the employer from arbitrarily deducting hard earned wages at its prerogative. Farady-Sultze v. Aurora Medical Center of Oshkosh, Inc. 2010 WI App 99, 327 Wis. 2d 110; 787 N.W.2d 433, 09-2429. An employer who fired an employee after discovering that it had mistakenly overpaid her and concluding that the employee kept those overpayments to herself, did not run afoul of this statute or the public policy. The employee never earned the extra payments and the statute does not protect her. Farady-Sultze v. Aurora Medical Center of Oshkosh, Inc. 2010 WI App 99, 327 Wis. 2d 110; 787 N.W.2d 433, 09-2429.