A balloon mortgage allows you to enjoy low monthly payments for several years — with a big catch. Here's the information you'll need to have handy to complete your secured promissory note, installment with balloon final payment.A balloon note is a type of loan where the borrower is required to make regular payments, called interestonly payments, for a specified period. Here is an example of how to fill a secured promissory note. The land contract may stipulate monthly payments until the entire amount is paid, or a final balloon payment may be due at the end. Learn how to create an Ohio Secured Promissory Note Template. The template is available in two different formats: .