Standards for underwriting are set by the two government-sponsored agencies of Fannie Mae and Freddie Mac. These two agencies set the guidelines and verification requirements for the mortgage industry. When your New Jersey Mortgage Lender is looking for documents, they are simply adhering to the standards set forth by these two agencies so that the loan can be purchased after closing. Occasionally, the documentation standards may be different if a lender is intending on keeping the mortgage loan in their portfolio, but this is a rare exception.