Okla. Stat. tit. 43, § 43-118.4: Assignment or transfer of child support benefits –

Attorney fees.

A. Child support or any claim thereto shall not be directly or

indirectly assigned, except as provided in subsection B of this

section and in subsection C of Section 237 of Title 56 of the

Oklahoma Statutes. Any assignment of child support to the

Department of Human Services shall have first priority over any

prior or subsequent assignment.

B. Child support may be assigned to an attorney for the purpose

of providing legal representation in child support proceedings. The

assignment shall be consistent with the Oklahoma Rules of

Professional Conduct and shall not exceed fifty percent (50%) of the

net amount of the child support collected and remitted to the

obligee.