If the borrower had signed a standard FannieMae application (1003), just above the signature line there is section IX Acknowledgement and Agreement. These are basically the borrower's reps and warranties on the loan.
Point (6) states " any owner or servicer of the loan may verify or reverify any information contained in the application from any source named in this application, and Lender, its successors or assignes may retain the original and/or an electronic record of this application even if the loan is not approved."
From a QC point, the verification to the bank should have come in with a signed copy of the acknowledgement and agreement.
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Integrity. With it, nothing else matters. Without it, nothing else matters.