Wis. Stat. § 19.25

The secretary of state, treasurer and attorney general, respectively, are authorized to require searches in the respective offices of each other and in the offices of the clerk of the supreme court, of the court of appeals, of the circuit courts, of the registers of deeds for any papers, records or documents necessary to the discharge of the duties of their respective offices, and to require copies thereof and extracts therefrom without the payment of any fee or charge whatever.