When the servicer requests reimbursement of a flood insurance premium it has advanced for an acquired property, Fannie Mae will calculate the amount of unearned premium refund that should be due. Fannie Mae will consider its calculated unearned premium refund amount as an unremitted refund that is still due if
the servicer's final request for expense reimbursement does not reflect the unearned premium refund as a credit, or
the servicer does not explain why the insurance carrier has not sent the servicer the unearned premium refund.
For more information please see: E-4.4-04: Remitting Flood Insurance Settlement Proceeds or Unearned Premium Refunds