Okla. Stat. tit. 59, § 858-358
Except as may be provided in a written brokerage agreement between the broker and a party to a transaction, the broker owes no further duties or responsibilities to the party after termination, expiration, or completion of performance of the transaction, except:
Laws 1999, HB 1178, c. 194, § 8, eff. November 1, 2000.