Cease and desist letters are common in internet defamation cases. When someone else, like a competing business, is defaming your business, a cease and desist letter is often all that it takes to make them remove the offending online review, social media post, or website.
By notifying them of the defamatory material, telling them to stop or remove it, and informing them of your intention to invoke your rights against them, many businesses can resolve the situation with relatively little stress and without the costs of going to court.