Wis. Stat. § 601.51: Provision of certified copies and notices.

(1) Certified copies. On request of any insurer authorized to do a surety business and its payment of the fee under s. 601.31 (1), the commissioner shall mail a certified copy of its certificate of authority to any designated public officer in this state who requires such a certificate before accepting a bond. That public officer shall file it. Whenever a certified copy has been furnished to a public officer it is unnecessary, while the certificate remains effective, to attach a copy of it to any instrument of suretyship filed.

(2) Notice of revocation of certificate. Whenever the commissioner revokes the certificate of authority of any insurer authorized to do a surety business, the commissioner shall immediately give notice thereof to each officer who was sent a certified copy under sub. (1).