Use this unsecured promissory note (installment with balloon final payment) to make your loan official. Create and download a promissory note for free!The note doesn't require collateral, and the balloon payment gives your business time to grow before having to make a substantial repayment. Set loan terms with larger payments at the end. Lender shall provide Borrower with a final written statement of monies due prior to the due date of the balloon payment. An agreement could also involve a balloon payment, specifying a date on which the entire unpaid balance is due.