When you record a deed of Trust you need a promissory note to spell out the terms of repayment interest rates etc. A Deed of Trust is a legal document similar to a home mortgage.It guarantees a real estate transaction between a lender and a borrower. I'm just going to take you through the exact process of how to fill out a deed of trust exactly and you can see what I mean it's very straight forward. The Note is the borrower's personal obligation for the 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 deed of trust is a document that you sign for buying a home. A deed of trust agreement obligates the borrower to repay a home loan, with the home serving as collateral if they default. When you take out a loan to purchase a home, you'll probably have to sign two documents: a promissory note and a mortgage (or deed of trust). Print or download in minutes.