Wis. Stat. § 889.13

A certified transcript from the original records, papers and files in or concerning any action or proceeding in municipal court is not admissible in evidence outside of the county, unless there is affixed a certificate of the clerk of the circuit court of the county, under seal, that the person who certified the transcript was, at the date thereof, a municipal judge of the county, or other person having legal custody of the books and papers; and if the judgment was rendered by another, that such other was, at the date of the rendition of the judgment, a municipal judge of the county.