Okla. Stat. tit. 12, § 12-1482: Tax title, sufficiency

The title by which the successful claimant succeeds against the

occupying claimant, in all cases of lands sold for taxes, by virtue

of any of the laws of this state, shall be considered an adverse and

better title, under the provisions of this article, whether it be

the title under which the taxes were due, and for which said land

was sold, or any other title or claim whatever; and the occupying

claimant holding possession of land sold for taxes, as aforesaid,

having the deed of a collector of taxes or county clerk for such

sale for taxes, or a certificate of sale of said land from a

collector of taxes or a county treasurer, or shall claim under the

person or persons who hold such deed or certificate, or any other

title or claim whatever, shall be considered as having sufficient

title to said land to demand the value of improvements under the

provisions of this article.