The Secretary of State shall not receive for record or for filing any mortgage, deed of trust or instruments supplementary thereto or amendatory thereof, described and covered in Section 1 hereof, unless and until the same has thereon the certificate of a county treasurer that the same has been presented to him under the provisions of the Real Estate Mortgage Tax Law, Title 68, Sections 1171 - 1182, O.S.1961, and that any real estate mortgage tax, if any is due, has been paid or that none is due thereon, as the case may be.
Okla. Stat. tit. 46, § 18