Okla. Stat. tit. 58, § 235

When such suspension is made, notice thereof must be given to the executor or administrator, and he must be cited to appear and show cause why his letters should not be revoked. If he fail to appear in obedience to the citation, or, if appearing, the court is satisfied there exists cause for his removal, his letters must be revoked, and letters of administration granted anew as the case may require.