Promissory Notes are essentially a legal document in which one party (the maker) promises to pay the owner or holder of the note. Promissory Note or Real Estate Note.A secured promissory note is a legal document that establishes a loan agreement between the borrower (also known as the "maker" of the note) and the lender. "Property" shall mean that certain real property located in the City of San Diego as legally described in Exhibit A of the Payment Agreement. Promissory notes are legal contracts that outline the terms of a loan and enforce the promise that a borrower will repay a loan within a specified period. The promissory note can be used for installment or balloon payments. A California promissory note template is a document designed to add security and structure to loan agreements between two parties. A California promissory note template is a document designed to add security and structure to loan agreements between two parties.