Okla. Stat. tit. 5, § 5-5: Proof of authority - Stay of proceedings

The court, on motion of either party and on the showing of

reasonable grounds therefor, may require the attorney for the

adverse party or for any one of the several adverse parties to

produce or prove by oath, or otherwise, the authority under which

the attorney appears and, until the attorney does so, may stay

proceedings by the attorney on behalf of the parties for whom the

attorney assumes to appear.

R.L. 1910, § 246. Amended by Laws 1965, c. 483, § 1, emerg. eff.

July 14, 1965; Laws 2006, c. 30, § 1, emerg. eff. April 11, 2006.