Wisconsin Statutes Trade Regulations (Ch. 125 to 139) § 133.15. No privilege from self-accusation

(1) No person may be excused from answering any of the interrogatories authorized under this chapter, nor from attending and testifying, nor from producing any books, papers, contracts, agreements or documents in obedience to a subpoena issued by any lawful authority in any action or proceeding based upon or growing out of any alleged violation of any provision of this chapter or of any law of this state in regard to trusts, monopolies or illegal combinations on the ground of or for the reason that the answer, testimony or evidence, documentary or otherwise, required may tend to incriminate or subject the person to a penalty or forfeiture. No person may be prosecuted or subjected to any penalty or forfeiture for or on account of testifying or producing evidence, documentary or otherwise, in obedience to any request under this section or any subpoena, in any such action or proceeding, except that the charter of any corporation or limited liability company may be vacated and its corporate existence annulled or its certificate of authority to transact business in this state may be canceled and annulled as provided in this chapter, and except that no person testifying in any such action or proceeding may be exempt from punishment for perjury committed in so testifying.

(2) The immunity provided under sub. (1) is subject to the restrictions under s. 972.085.