Use this unsecured promissory note (installment with balloon final payment) to make your loan official. Create and download a promissory note for free!Quickly create your customized promissory note (IOU) when lending or borrowing money with a variety of payment methods. The Application Process: 1. Apply for and have your eligibility determined for other sources of financial aid, including federal and state grants. A balloon payment is similar to installments, except the monthly installments are the same. Promissory Note With Balloon Payment Template Fill Online Printable Fillable Blank pdfFiller. Why Are Balloon Payments Good for Mortgage Notes Note Investor. 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.