Okla. Stat. tit. 21 § 1579
Every person who has in his or her possession any forged or counterfeited instrument, the forgery of which has previously been declared to be punishable, other than such as are enumerated in Section 1578 of this title, knowing the same to be forged, counterfeited or falsely altered with intent to injure or defraud by uttering the same to be true, or as false, or by causing the same to be 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, § 1579