Minn. Stat. § 272.482: EXECUTION OF NOTICES AND CERTIFICATES.

Execution of notices of liens, certificates, or other notices affecting federal liens by the secretary of the treasury of the United States or a delegate, or by any official or entity of the United States responsible for filing or certifying of notice of any other lien, entitles them to be filed and no other attestation, certification, or acknowledgment is necessary. For purposes of this section, transmission of notices under section 272.488, subdivisions 1 and 3, constitutes execution.