Okla. Stat. tit. 60, § 651.2
Any sum payable on a check, certified check, cashier's check, draft, or similar instrument, except those subject to Section 651.1 of this title, on which a banking or financial organization is directly liable, which has been outstanding for more than five (5) years after it was payable or after its issuance if payable on demand, is presumed abandoned, unless the owner, within five (5) years, has communicated in writing with the banking or financial organization concerning it or otherwise indicated an interest as evidenced by a memorandum or other record, on file, prepared by an employee thereof.
Added by Laws 1991, HB 1538, c. 331, § 3, eff. September 1, 1991.