Set loan terms with larger payments at the end. Here's the information you'll need to have handy to complete your secured promissory note, installment with balloon final payment.Lender shall provide Borrower with a final written statement of monies due prior to the due date of the balloon payment. Installment Payments with a Final Balloon Payment : These are used mostly in mortgage loans. Clarify your loan agreements in Arizona. Use our online, customizable promissory note template to outline all key terms and conditions. Use this unsecured promissory note (installment with balloon final payment) to make your loan official. Create and download a promissory note for free!