Okla. Stat. tit. 58 § 1106
The court shall thereupon fix a date, time and place for the final account and petition, which date shall be not less than ten (10) nor more than thirty (30) days after the filing of the final account and petition. There shall be notice given by mailing to the heirs and contingent legatees and devisees of the decedent, whose names and addresses are known, not less than ten (10) days prior to the date of the hearing and by publication one time in a newspaper in the county not less than ten (10) days prior to the hearing. Proof of such notice shall be made and filed as in other estate proceedings.
The hearing shall be held and findings and orders made, filed and recorded in the same manner as in other estate proceedings.
Okla. Stat. tit. 58, § 1106