Okla. Stat. tit. 17, § 285
For purposes of communicating information to a customer, including delinquent and termination notices, the Corporation Commission shall allow a utility to use either written or oral communications by the utility to the customer. Oral communications may be over the telephone or in person.
Laws 1994, SB 1160, c. 315, § 11, emerg. eff. July 1, 1994.