Here's the information you'll need to have handy to complete your unsecured promissory note, interest-only with balloon final payment. A Promissory Note with Balloon Payments is a loan contract that enables a lender set loan terms with one or more larger payments at the end.This document is a secured promissory note between a borrower and payee. Here's the information you'll need to have handy to complete your secured promissory note, interest-only with balloon final payment. It specifies the principal amount, annual interest rate, payment terms including monthly interest-only payments and a final balloon payment. The Texas Real Estate Lien Note is a oneway agreement in which the signer makes a promise to pay someone a specific sum of money at a specific time. Interest Only Payments. A balloon note is a type of loan where the borrower is required to make regular payments, called interestonly payments, for a specified period.