Okla. Stat. tit. 21 § 1578
Every person who, with intent to defraud, has in his or her possession any forged, altered or counterfeit negotiable note, bill, draft or other evidence of debt issued or purporting to have been issued by any corporation or company duly authorized for that purpose by the laws of this state or of any other state, government or country, the forgery of which is hereinbefore declared to be punishable, knowing the same to be forged, altered or counterfeited, with intent to utter the same as true or as false, or to cause the same to be so uttered, is guilty of forgery in the second degree if the value of the instrument is One Thousand Dollars ($1,000.00) or more and forgery in the third degree if the value of the instrument is less than One Thousand Dollars ($1,000.00).
For purposes of this section, a series of offenses may be aggregated into one offense when they are the result of the formulation of a plan or scheme or the setting up of a mechanism which, when put into operation, results in the taking or diversion of money or property on a recurring basis. When all acts result from a continuing course of conduct, they may be aggregated into one crime. Acts forming an integral part of the first taking which facilitate subsequent takings, or acts taken in preparation of several takings which facilitate subsequent takings, are relevant to determine the intent of the party to commit a continuing crime.
Okla. Stat. tit. 21, § 1578