Okla. Stat. tit. 59 § 3105
Without penalty or cost of any kind, a debtor in a deferred deposit loan transaction shall have the right to rescind in writing the deferred deposit loan until 5 p.m. on the next business day following the day the debtor signs the deferred deposit loan agreement; provided, any attempted rescission will not be effective unless the notice is timely and is accompanied by a return of the full principal advanced by the lender to the debtor. Exercising rescission entitles the debtor to a full refund of all fees paid by the debtor as part of the deferred deposit loan transaction. Rescission occurs when the debtor gives written notice of rescission to the lender at the address of the office of the licensee as stated in the deferred deposit agreement or at the location where the transaction occurred.
Okla. Stat. tit. 59, § 3105