When such unpaid amounts have been paid in full, the Interest Rate shall thereafter return to the amount set forth in the first paragraph of this Note. 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. Such table should also clearly indicate any balloon payments as well, with any required Civil Code language if it is related to a residential loan. Here's the information you'll need to have handy to complete your secured promissory note, interest-only with balloon final payment. If interest is charged, the rate should be included with a repayment schedule.