Section A: List the full property address as it appears on the original document and include Municipality. This may be pulled from the Legal Description.The mortgage modification agreement is a legal document between a lender and borrower to change an existing loan's terms. Complete PA Mortgage Lender. Experienced Loan Modification Attorney to answer all your Loan Modification, Chapter 7, and Chapter 13 Bankruptcy Questions. A mortgage modification is an agreement between you and the mortgage lender to change the terms of your existing loan. A loan modification agreement used when a borrower is not in default to amend the terms of a commercial real estate loan in Pennsylvania. The statement of policy is effective upon publication in the Pennsylvania Bulletin.