Ohio Revised Code Title XLVII. Occupations Professions § 4763.14

A person licensed, registered, or certified under this chapter shall retain for a period of five years the original or a true copy of each written contract for the person's services relating to real estate appraisal work, all appraisal reports, and all work file documentation and data assembled in preparing those reports. The retention period begins on the date the appraisal report is submitted to the client unless, prior to expiration of the retention period, the certificate holder, registrant, or licensee is notified that the appraisal or report is the subject of or is otherwise involved in pending litigation, in which case the retention period shall commence two years from the date of final disposition of the litigation.

A certificate holder, registrant, and a licensee shall make available all records required to be maintained under this section for inspection and copying by the superintendent of real estate or the real estate appraiser board, or both, upon reasonable notice to the certificate holder, registrant, or licensee.