Wis. Stat. § 2.06

The records of Iron and Forest counties, which have been or may be transcribed from the original records of other counties, of which the territory now comprising either of said counties was formerly a part, under and by direction of the county board of either such counties and properly attested by the affidavit of the person or persons making such transcription or certified to under the hand and official seal of the officer having the custody of such original records shall be received in all courts as prima facie evidence of the matters therein contained in the same manner as now provided by law for the reception of record evidence, and as to Iron County shall be so received notwithstanding any defects in said certificate, either as to form or omission therefrom of matter or facts required by law to be stated. One such certificate to each volume of records or other documents so transcribed shall be deemed sufficient.