Set loan terms with larger payments at the end. Promissory Note with Balloon Payments - Read online for free.This document is used to loan or borrow money. An unsecured promissory note with amortized payments is a promise to pay back a loan when there's no collateral, and it'll be repaid in equal installments. All prepayments shall first be applied to outstanding late fees, then to accrued interest and thereafter to the principal loan amount.