Wisconsin Statutes Insurance (Ch. 600 to 655) § 632.17. Validity of surety bonds

(1) Failure to file certificate. No instrument executed by an insurer authorized to do a surety business is ineffective because of failure to file the certificate of its authority to do business in this state or a certified copy thereof; but the officer with whom any instrument so executed has been filed or any person who might claim the benefit thereof may by written notice require the person filing the instrument to have a certified copy of the certificate of authority filed with the officer, and unless the copy is filed within 8 days after receipt of the notice the instrument does not satisfy the requirement that the instrument be supplied.

(2) Satisfaction of obligations to provide surety. An undertaking in appropriate terms issued by an insurer authorized to do a surety business satisfies and is complete compliance with any authorization or requirement in the law of this state respecting surety bonds, undertakings or other similar obligations, and shall be accepted as such by any official authorized to receive or empowered to require such an undertaking, subject to sub. (1).