In this article, we share tips for writing a short, simple resignation letter and offer examples for you to reference when creating your own. Below is a sample union resignation letter.You should check your union's constitution and bylaws to see if it is specific to whom a resignation must be sent. Learn how to write a resignation letter with our easy-to-use template and examples! In the body of the letter, immediately state your intention to resign and provide your reasoning, including only positive feelings towards your work experience. Then, state your intent to resign and exact date of departure. Explore readymade resignation letter templates tailored for different situations, learn about its essential components, and do and don'ts.