If the debt remains uncollected and, in the case of a parking citation, if the debtor has not contested the citation within 20 days after the notice under sub. (2), the department shall set off the debt against any refund that is owed to the debtor after the setoff under s. 71.93. Any legal action contesting a setoff shall be brought against the municipality or county that certified the debt under sub. (2).

The department shall provide the information obtained under sub. (2) to the department of administration. Before reducing any disbursement as provided under this paragraph, the department of administration shall contact the department to verify whether a certified debt that is the basis of the reduction has been collected by other means and, in the case of a parking citation, whether the debtor has contested the citation within 20 days after the notice under sub. (2). If the certified debt remains uncollected and, in the case of a parking citation, the citation has not been contested within 20 days after the notice under sub. (2), the department of administration shall, after any reduction under s. 71.93, reduce the disbursement by the amount of the debtor’s certified debt under sub. (2), notify the department of such reduction and disbursement, and remit the amount of the reduction to the department in the manner prescribed by the department. If more than one debt certified under sub. (2) exists for any debtor, the disbursement shall be reduced first by the earliest debt certified. Any legal action contesting a reduction under this paragraph shall be brought against the municipality or county that certified the debt under sub. (2).