This section provides policies that apply to promissory notes, contracts for deed and other property agreements. Here's the information you'll need to have handy to complete your unsecured promissory note, interest-only with balloon final payment.The Application Process: 1. Apply for and have your eligibility determined for other sources of financial aid, including federal and state grants. The Minnesota Secured Promissory Note Template is a legal document used to detail the principal sum, interest rate, payment method, and other facets of a loan. Sum payment means you'll pay everything, including the principal amount and accrued interest, in a wholesome. A single final balloon payment for the entire outstanding Principal amount and interest accrued will be paid on or before the day of. In the amount and manner hereinafter specified, for value received, the undersigned. Start with the date.