Okla. Stat. tit. 15, § 15-233A: Procedures in actions for rescission

Where the action, counter claim, cross claim or plea in

intervention is timely brought for relief based on the theory of

rescission, whether formerly the action would have been denominated

rescission at law or rescission in equity, the service of a pleading

on the adverse party shall be deemed sufficient notice of rescission

and of an offer to restore the benefits received under the contract.

The method of trial to be afforded shall depend on the relief to

which the party who brought suit on the theory of rescission is

entitled.