An underwriter determines front and back end DTI, Payment Shock & Assets. They also have extensive knowledge of tax returns for S-Corps, Self Employed, etc., Appraisal Review, Title Review, Risk Analysis, Due Diligence, Fraud Determination/Prevention, Clear Tangible Net Benefit to consumer. FHA/VA guidelines, Fannie/Freddie Underwriting Guidelines, DU/LP, Credit Review, Data Entry, Common Sense (not always), PTD Condition, PTC condition & PTF condition. File comes back when PTD's come in, conditions cleared, file sent to closing department.