The Florida promissory note requirements include the amount borrowed, repayment terms, interest rate, parties' names, and signatures. Here's the information you'll need to have handy to complete your unsecured promissory note, interest-only with balloon final payment.Can be used for traditional installments or balloon payment. Use this simple promissory note template for Florida to create a legally binding contract between two individuals when borrowing money in Florida. THIS IS A BALLOON MORTGAGE SECURING A VARIABLE (adjustable; renegotiable) RATE OBLIGATION. The Florida Promissory Note Installment PDF is a very simple form to fill out.