Okla. Stat. tit. 68, § 68-1907: Payment prerequisite to recording, use as evidence

No mortgage of real property shall be recorded by any county

clerk unless there shall be paid the tax imposed by and as in this

article provided. No mortgage of real property which is subject to

the taxes levied by this article shall be released, discharged of

record or received in evidence in any action or proceeding, nor

shall any agreement extending any such mortgage be recorded unless

the taxes levied thereon by this article shall have been paid as

provided in this article. No judgment or final order in any action

or proceeding shall be made for the foreclosure or enforcement of

any mortgage which is subject to the taxes levied by this article or

of any debt or obligation secured by or which secures any such

mortgage unless the taxes levied by this article shall have been

paid as provided in this article.