Okla. Stat. tit. 59, § 59-858-729: Retention of records - Inspection by Board

A. An Oklahoma certified real estate appraiser shall retain for

five (5) years, originals or true copies of all written contracts

engaging that appraiser's services for real property appraisal work,

and all reports and supporting data assembled and formulated by the

appraiser in preparing the reports.

B. This five-year period for retention of records is applicable

to each engagement of the services of the appraiser and shall

commence upon the date of the submittal of the appraisal to the

client unless, within such five-year period, the appraiser is

notified that the appraisal or report is involved in litigation, in

which event the five-year period for the retention of records shall

commence upon the date of the final disposition of such litigation.

C. All records required to be maintained pursuant to the

provisions of the Oklahoma Certified Real Estate Appraisers Act

shall be made available by the Oklahoma certified real estate

appraiser for inspection and copying by the Board on reasonable

notice to the appraiser.