Who must maintain a work file according to USPAP?

• A. The client
• B. The appraiser
• C. The mortgage lender
• D. The regulator

Answer: (B)

USPAP requires the appraiser to maintain a complete workfile for every assignment. This file should document the data used, analyses performed, and the conclusions reached, including sources, dates, and any communications or work steps that support the appraisal. The appraiser must retain the workfile for a specified period—generally at least five years after the final report date or two years after any dispute resolution related to the assignment, whichever is longer. This obligation ensures there is a traceable, defendable record of how the appraisal was developed and allows appropriate review by clients, other intended users, or regulators. The responsibility to maintain the workfile rests with the appraiser, not the client, mortgage lender, or regulator.