Minn. Stat. § 82C.13: RECORD KEEPING.

An appraisal management company must maintain a detailed record of each service request that it receives and the employee appraiser or independent appraiser that performs the appraisal assignment for the appraisal management company.

Records must be kept for a period of at least five years after the appraisal assignment request is sent to the independent appraiser or completion of the appraisal report, whichever period expires later.