Promissory notes should include the date of the sale, and the borrower's name and address. Also include the amount loaned and the interest rate. Make sure you include the monthly payment amount, as well as any late fees. Also, include that if the borrower defaults, you, as the lender, would have recourse through the court system or attorney if needed. Free promissory note forms can be found at
. http://www.expertlaw.com/library/business/promissory_note_form.html. Another site to check is http://www.freelinks.com/forms/promissory.php.