Wis. Stat. § 194.46
The department may at any time, by its order duly entered after a hearing had, upon notice to the holder of any certificate, license, or permit under this chapter and an opportunity to be heard, at which it shall be proved that the holder has willfully violated or refused to comply with any of the provisions of this chapter or s. 346.924, or any orders or rules of the department, alter, amend, suspend, or revoke the certificate, license, or permit. The department may suspend or revoke a certificate, license, or permit under this chapter if, after providing the holder thereof notice and an opportunity to be heard on the matter, the department finds that service under the certificate, license, or permit has been abandoned. A person who is aggrieved by an order of the department under this section may, within 30 days after the date that the order is issued, request a review of the order by the division of hearings and appeals.
Wis. Stat. § 194.46