Wis. Stat. § 401.307: Prima facie evidence by 3rd-party documents.

A document in due form purporting to be a bill of lading, policy or certificate of insurance, official weigher’s or inspector’s certificate, consular invoice, or any other document authorized or required by the contract to be issued by a 3rd party shall be prima facie evidence of its own authenticity and genuineness and of the facts stated in the document by the 3rd party.