Okla. Stat. tit. 12, § 12-1033
Proceedings by petition, when - Summons
If more than thirty (30) days after a judgment, decree, or
appealable order has been filed, proceedings to vacate or modify the
judgment, decree, or appealable order, on the grounds mentioned in
paragraphs 2, 4, 5, 6, 7, 8, and 9 of Section 1031 of this title,
shall be by petition, verified by affidavit, setting forth the
judgment, decree, or appealable order, the grounds to vacate or
modify it, and the defense to the action, if the party applying was
defendant. On this petition, a summons shall issue and be served as
in the commencement of a civil action.
R.L. 1910, § 5269. Amended by Laws 1999, c. 293, § 11, eff. Nov. 1,
1999