Okla. Stat. tit. 5, § 5-7: Contingent fee - Limitation on amount - Compromise or

settlement - Effect on lien - Certain contracts void.

It shall be lawful for an attorney to contract for a percentage

or portion of the proceeds of a client's cause of action or claim

not to exceed fifty percent (50%) of the net amount of such judgment

as may be recovered, or such compromise as may be made, whether the

same arises ex contractu or ex delicto, and no compromise or

settlement entered into by a client without such attorney's consent

shall affect or abrogate the lien provided for in this chapter.

Provided that all such contracts in personal injury or wrongful

death cases including, but not restricted to, cases in which

jurisdiction is in the Industrial Commission, shall be void and

unenforceable (1) if secured as a result of the intervention of any

laymen, association, or corporation for compensation, or promise of

compensation, or anticipation of gift, compensation or hope of

reward, or (2) where any laymen, association or corporation has a

direct or indirect interest in, or growing out of, any judgment

arising out of such claim recovery or compensation from, or

settlement of any such claim.