Send a warning letter when you are warning someone and notifying them in advance of some potential negative action or result. You will sometimes write a letter like this on behalf of someone else, such as your child, your elderly parent, or someone who has placed you in charge of his or her affairs. Sometimes, warning letters are professional in tone and style, but they can also be more informal and conversational, depending on who is receiving the letter. The style and wording you use in a letter depend on the specific circumstances.

It is generally best to keep letters as short and concise as possible while still communicating the necessary information. Feel free to customize and modify any of these letters according to your individual needs.

NOTE: In all letters, brackets indicate information that you should fill in. Remove the brackets when you have modified the text to your liking.