Okla. Stat. tit. 58, § 58-233: Proof of appointment

A transcript from the minutes of the court, showing the

appointment of any person as executor or administrator, together

with the certificate of the judge, under his hand and the seal of

his court, that such person has given bond and qualified, and that

letters testamentary or of administration have been issued to him

and have not been revoked, shall have the same effect in evidence as

the letters themselves.