The department may dismiss the complaint if the complainant fails to respond to the department within 20 days from the date of mailing of any correspondence from the department concerning the complaint, provided that correspondence was sent by certified mail, return receipt requested, to the last known address of the complainant. The department may send certified or regular mail to determine whether the complainant wishes to continue pursuing the case or for other reasons determined to be appropriate by the department. If regular mail is not returned to the department, there is a presumption that it was received by the complainant.
Wis. Admin. Code Department of Workforce Development DWD 226.07