Okla. Stat. tit. 58, § 58-338: Claims filed in court after allowance

Every claim allowed by the personal representative, and approved

by the judge, must, within thirty (30) days after approval by the

judge, be filed in the district court and ranked among the

acknowledged debts of the estate, to be paid in due course of

administration. If the claimant has left any original voucher in

the hands of the personal representative, or suffered the same to be

filed in court, he may withdraw the same when a copy of the same has

been already, or is then, attached to his claim.