Okla. Stat. tit. 58, § 716

Whenever the probate code requires that an order setting date of hearing and giving notice thereof be signed by a judge, the chief judge in the county may by judicial order provide that such order or notice may be signed by the court clerk or his deputy affixing his signature beneath the place where the judge's name appears followed with the word "by;" and then followed with the signing officer's title. Where both an order and notice as to any particular act provided for in this title are required, allowed, or authorized by law or by order of the court, said order and notice may be combined in one document. Laws 1973, c. 45, § 1, emerg. eff. April 27, 1973.