Okla. Stat. tit. 15, § 15-755.2: Contracts - Calls from automatic dial answering devices

- Voidability.

A contract or agreement to purchase any consumer goods or

services pursuant to an unsolicited telephone call or message,

including a cellular telephone call or text message, made by an

automatic dial announcing device conveying a prerecorded or

synthesized voice message or an automatic dialing device with

electronic text message delivery capabilities and without the use of

a live operator in violation of the Oklahoma Consumer Protection Act

shall be voidable at the option of the consumer, unless it has been

memorialized in writing and signed by the consumer.