Okla. Stat. tit. 21, § 1622

Every person who, with intent to defraud, makes or subscribes any instrument in his own name, intended to create, increase, discharge, defeat or diminish any pecuniary obligation, right or interest, or to transfer or affect any property whatever, and utters or passes such instrument, under the pretense that it is the act of another who bears the same name, is guilty of forgery, a Class B3 felony offense, in the same degree as if he had forged the instrument of a person bearing a different name from his own.