Okla. Stat. tit. 16, § 93
Every deed or other instrument affecting real estate made by a corporation must have the name of such corporation subscribed thereto either by an attorney-in-fact, president, vice-president, chairman or vice-chairman of the board of directors of such corporation.
R.L. 1910, § 1186; Amended by Laws 1987, HB 1347, c. 146, § 26, emerg. eff. June 24, 1987; Amended by Laws 1994, HB 2783, c. 238, § 4, eff. September 1, 1994.