Okla. Stat. tit. 58, § 58-348: Reference of claim to third person

If the executor or administrator doubts the correctness of any

claim presented to him, he may enter into an agreement, in writing,

with the claimant, to refer the matter in controversy to some

disinterested person, to be approved by the judge of the county

court. Upon filing the agreement, and approval of the judge of the

county court, in the office of the clerk of the district court for

the county or judicial subdivision in which the letters testamentary

or of administration were granted, the clerk must, either in

vacation or in term, enter a minute of the order referring the

matter in controversy to the person so selected; or if the parties

consent, a reference may be had in the county court; and the report

of the referee, if confirmed, establishes or rejects the claim, the

same as if it had been allowed or rejected by the executor or

administrator and the county judge.