Okla. Stat. tit. 16, § 16-92: Instrument by corporation valid

Every instrument affecting real estate or authorizing the

execution of any deed, mortgage or other instrument relating

thereto, executed and acknowledged by a corporation or its attorney

in fact in substantial compliance with this chapter, shall be valid

and binding upon the grantor, notwithstanding any omission or

irregularity in the proceedings of such corporation or any of its

officers or members, and without reference to any provision in its

constitution or by-laws.