Use this unsecured promissory note (installment with balloon final payment) to make your loan official. Create and download a promissory note for free!The Unsecured Promissory Note Template contains a sample unsecured promissory note that can be customized to document a loan to you. Follow the instructions below to complete Nevada Unsecured Installment Payment Promissory Note for Fixed Rate - Nevada online easily and quickly. A Nevada promissory note template is an official contract that is drafted between people to clarify the terms of lending money. The note doesn't require collateral, and the balloon payment gives your business time to grow before having to make a substantial repayment.