OCC 2005-6 "Should all appraisals undergo a compliance review?"
Yes, prior to a final credit decision, regulated institutions should perform a compliance review on all appraisals to confirm that they comply with the minimum appraisal standards as outlined in the agencies' appraisal regulations..."
Review should be required on all appraisals and evals, but the extent of the review should depend on the risk of the transaction.
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Just working here until I get my letter from Hogwarts.