Here's the information you'll need to have handy to complete your unsecured promissory note, interest-only with balloon final payment. Here's the information you'll need to have handy to complete your secured promissory note, interest-only with balloon final payment.A balloon note is a type of loan where the borrower is required to make regular payments, called interestonly payments, for a specified period. Interest Only Payments. Exhibit 10.1 First Union Real Estate Balloon Promissory Note This item begins on the following page. If interest is charged, the rate should be included with a repayment schedule.