Wis. Admin. Code Department of Workforce Development DWD 226.05
If an employer is not in compliance with the notice posting requirements of s. 103.11(14) (a), Stats., when a violation occurs under s. 103.11, Stats., an employee complaining of that violation shall be deemed not to "reasonably have known" that a violation occurred within the meaning of s. 103.11(12) (a), Stats., at the time of the violation or the first date that the employee obtains actual knowledge of the information contained in the required notice, whichever date occurs earlier. If the employer is not in compliance with the notice posting requirements of s. 103.11(14) (a), Stats., when a violation occurs under s. 103.11, Stats., the employer has the burden of proving actual knowledge on the part of the employee within the meaning of this section.
Wis. Admin. Code Department of Workforce Development DWD 226.05