Borrower promises to make a single, final payment for the entire balance owed to the Payee on or before. Use this unsecured promissory note (installment with balloon final payment) to make your loan official.Create and download a promissory note for free! Set loan terms with larger payments at the end. On the top box- fill in the dollar amount of the loan. Then fill in the City and State where the loan is made and the Date of the loan. A Utah promissory note is a written contract between a lender and a borrower. The borrower receives a loan from the lender and promises to repay it.