Okla. Stat. tit. 36, § 5004
A "title insurance policy" is any written instrument purporting to show the title to real or personal property or any interest therein or encumbrance thereon, or to furnish such information relative to real property, which written instrument in express terms purports to insure or guarantee such title or the correctness of such information.
Laws 1957, HB 501, p. 408, § 5004, emerg. eff. May 27, 1957.