Okla. Stat. tit. 2, § 4-12
All persons selling livestock with a registered brand shall upon request provide a written transfer of ownership to the purchaser.
Laws 1955, HB 505, p. 32, art. 4, § 12; Amended by Laws 2000, SB 1402, c. 243, § 37, emerg. eff. May 24, 2000 (superseded document available).