Project notes are a short-term debt obligation issued to finance a project or endeavor past a specified milestone, or to fund multiple small projects on a short-term basis.

Interest can be compounded on long-term notes receivable that carry unpaid interest. For example, if a business holds a two-year, 10 percent, $5,000 note, the note accrues $500 over the first year.

Examples of short-term paper include U.S. Treasury bills and negotiable instruments issued by financial and non-financial entities, such as commercial paper, promissory notes, and bills of exchange.

Your thank-you note doesn’t need to be a novel. A few sentences or a short paragraph will do. In the grand scheme of things, it’s a miniscule investment of your time that will have a big impact.