Okla. Stat. tit. 60, § 657.4
A. All intangible property, including but not limited to securities, principal, interest, dividends or other earnings thereon, less any lawful charges, held by a business association, federal, state or local government or governmental subdivision, agency or entity, or any other person or entity, regardless of where the holder may be found, if the owner has not claimed such property or corresponded in writing with the holder concerning the property within three (3) years after the date prescribed for payment or delivery by the issuer, unless the holder is a state that has taken custody pursuant to its own unclaimed property laws, in which case no additional period of holding beyond that of such state is necessary hereunder, is presumed abandoned and subject to the custody of this state as unclaimed property if:
Laws 1992, HB 2182, c. 295, § 27, emerg. eff. July 1, 1992; Amended by Laws 2000, SB 1390, c. 136, § 4, emerg. eff. July 1, 2000 (superseded document available).