What is a Cease & Desist Letter? A Cease and Desist Letter is a letter that requests that an individual or organization stop a specified action and refrain from doing it in the future, with a threat of legal action if the recipient fails to comply. A Cease and Desist Letter is different than a Cease and Desist Order, which is an order given by a judge to stop an illegal activity. Who can send a Cease & Desist Letter? Anyone can send a Cease and Desist Letter.