A simple promissory note might be for a lump sum repayment on a certain date. For example, let's say you lend your friend $1,000 and he agrees to repay you by December 1st. The full amount is due on that date, and there is no payment schedule involved.
Promissory notes are contracts and contracts don't make dishonest people honest. A DIY contract is likely a mistake. You can buy a promissory note off of a site like or use a local attorney.
How to write an agreement letter Title your document. Provide your personal information and the date. Include the recipient's information. Address the recipient and write your introductory paragraph. Write a detailed body. Conclude your letter with a paragraph, closing remarks, and a signature. Sign your letter.