A trust deed is always used together with a promissory note (also called "prom note") that sets out the amount and terms of the loan. Modifying Promissory Note and Deed of Trust.A Deed of Trust is rarely used without a Promissory Note. A promissory note is one of the two documents needed for a Real Estate Loan. A legal document that gives a lender a security interest in real property until the loan is paid off; typically used together with a promissory note. A Deed of Trust is typically used in combination with a Promissory Note or Mortgage Agreement which sets out the amount and terms of the loan agreement. A living trust amendment form is used to make minor changes (such as adding a beneficiary) to a revocable living trust. This article discusses the typical modifications of a note and reviews the use of a note modification agreement and the modification of note forms. What Is a Loan Modification? Loan modification is a term that commonly refers to the adjustment of monthly payments on a mortgage loan.