A loan modification is an agreement with your lender to change the terms of your loan to make the payment more affordable. A Modification still must be documented correctly to be enforceable and to maintain the lender's original lien priority.Fannie Mae has updated their instructions for the Loan Modification Agreement (Form 3179). Governmentbacked programs aimed at lowering the barriers to buying homes may present loan modification claims when owners try to sell. " The mortgages, deeds of trust, or other security instruments and any additional security. New York, New York 10281. Attention: Donald F. Simone, Esq. Note that New York uses mortgages, although some states use a document called a deed of trust.