Okla. Stat. tit. 68, § 68-3404: Certification by U.S. Secretary of Treasury and other

officials.

Certification of notices of liens, certificates, or other

notices affecting federal liens by the Secretary of the Treasury of

the United States or his 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 acknowledgement is necessary.