Wis. Stat. § 444.15
Whenever any promoter or club fails to make a report of any professional contest or amateur unarmed combat sports contest at the time prescribed or whenever a report is unsatisfactory to the department, the secretary may examine the books and records of the promoter or club, may subpoena and examine, under oath, the promoter or the club's officers and other witnesses to determine the total amount of its gross receipts for any contest, and may hire an independent auditor to assist in making the determination. The secretary may require the promoter or club to pay the expenses of conducting the examination or the independent auditor's fee. If a promoter or club fails to pay the amount of expenses determined by the secretary to be due within 20 days after receiving notice of the amount, the promoter or club shall forfeit its license, be disqualified from receiving any license under this chapter, and forfeit to the state the sum of $1,000, which may be recovered by the department of justice in the name of the state.
Wis. Stat. § 444.15