Okla. Stat. tit. 59, § 59-858-728: Contingent fees

A. An Oklahoma certified real estate appraiser may not accept a

fee for an appraisal assignment, as defined in the Oklahoma

Certified Real Estate Appraisers Act, that is contingent upon the

appraiser reporting a predetermined estimate, analysis or opinion or

is contingent upon the opinion, conclusion or valuation reached, or

upon the consequences resulting from the appraisal assignment.

B. An Oklahoma certified real estate appraiser who enters into

an agreement to perform specialized services, as defined in the

Oklahoma Certified Real Estate Appraisers Act, may be paid a fixed

fee or a fee that is contingent on the results achieved by the

specialized services.

C. If an Oklahoma certified real estate appraiser enters into

an agreement to perform specialized services for a contingent fee,

this fact shall be clearly stated in each written and oral report.

In each written report, this fact shall be clearly stated in a

prominent location in such report and also in each letter of

transmittal and in the certification statement made by the appraiser

in such report.