Okla. Stat. tit. 21, § 21-563: Application of preceding sections

The provisions of the foregoing sections relating to the buying

of claims by an attorney with intent to prosecute them, or to the

lending or advancing money by an attorney in consideration of a

claim being delivered for collection, shall apply to every case of

such buying a claim, or lending or advancing money by any person

prosecuting a suit or demanding in person.