send them this, taken directly from a fannie mae lender letter:
Lender Letter LL-2015-02
The risk analysis performed by CU is for exclusive use by the lender in their analysis of the appraisal report. After completing a thorough review, a lender should be able to have constructive dialogue with the appraiser to resolve specific appraisal questions or concerns. Although the lender may use output from Collateral Underwriter to inform its dialogue with appraisal management companies and appraisers regarding appraisals they supplied, the CU license terms prohibit providing these entities with copies or displays of Fannie Mae reports that contain CU findings, including without limitation the CU Print Report, the UCDP Submission Summary Report, or any other CU report. The lender must not make demands or provide instructions to the appraiser based solely on automated feedback. Also the CU license terms prohibit using it “in a manner that interferes with the independent judgment of an appraiser.” Fannie Mae expects the lender to use human due diligence in combination with the CU feedback, and will actively follow up with lenders who are reported to be asking appraisers to change their reports based on CU feedback without any further due diligence.
Fannie Mae does not instruct or suggest to lenders that they ask the appraiser to address all or any of the 20 comparables that are provided by CU for most appraisals. It is also not Fannie Mae’s expectation that appraisals should contain only CU’s top-ranked comparable sales. In the majority of cases, there may be no material difference between comparable sales utilized by the appraiser and those identified by CU. Before asking the appraiser to consider any alternative sales, it is imperative that the lender analyze the relevance of the sale and determine if the use of such sale would result in any material change to the appraisal report. If the lender determines that there would be no material change, then they should not ask the appraiser to make revisions. Fannie Mae expects CU to enable lenders to accept appraisals “as is” with greater confidence.