The phrase "auction of promises" refers to a fundraising event where instead of auctioning off physical items, individuals offer to provide a service or complete a task. Some synonyms for "auction of promises" include a "service auction," a "talent auction," or a "donation auction." These events can be a fun and unique way to raise money for a charity or organization. Participants can offer a variety of promises such as cooking a meal, providing a tennis lesson, or doing someone's yard work. The highest bidder is then able to claim the promise and the funds raised go towards a good cause.