Minn. Stat. § 46.33

Any service required or authorized to be made by the commissioner pursuant to sections 46.23 to 46.33 may be made by registered or certified mail to the last known address of the person or principal Minnesota office of the institution to whom service is directed, or in such other manner reasonably calculated to give actual notice as the commissioner by rule or otherwise may provide. Copies of any notice or order served by the commissioner upon any institution or any director, trustee or officer thereof or other person participating in the conduct of its affairs, pursuant to the provisions of sections 46.23 to 46.33 , may also be sent to the appropriate federal supervisory authorities.