Okla. Stat. tit. 12, § 12-708: Form and proof of notice - Fee

A printed docket or other written notice, setting forth the

style of the cause and the day that the same is set for trial or

hearing, may be mailed, by registered mail, by the court clerk or

opposing counsel, addressed to the Attorney General or the assistant

Attorney General appearing as attorney of record for the State of

Oklahoma, not less than ten (10) days prior to the date set for such

trial or hearing, and the registry return of such notice shall be

sufficient proof of the notice herein required. The court clerk is

authorized to tax up as cost for each notice given twenty-five cents

($0.25).