Okla. Stat. tit. 58, § 58-128: Notice of hearing

A. When a petition praying for letters of administration is

filed, the judge of the court must set a day for hearing the same

and cause notice thereof to be given, containing the name of the

decedent, the name of the applicant for letters, and the day on

which the application will be heard.

B. If the names and addresses of all heirs of the decedent are

known to the petitioner and are set out in the petition, the notice

must be given, as provided in Section 34 of this title, by mailing a

copy of the same to each of the heirs of the deceased with the

postage thereon prepaid at least ten (10) days before the day set

for the hearing.

C. If the name or address of one or more heirs of the decedent

is not known to the petitioner, notice of the hearing of the

petition shall be given by mailing, as above provided, and by

publishing the same one time in a legal newspaper in the county at

least ten (10) days before the day set for the hearing.

D. If the petition asks for the appointment of some person

entitled under the law to appointment, and there shall accompany

such petition a waiver of all persons having a prior right to

appointment or if the applicant has a prior right of appointment,

then no notice shall be given and the court shall proceed without

delay to hear such petition.