Leaving a job isn't easy. A short resignation letter is the way to go.Include your name, position, the date of resignation and the intended last day of work in the first paragraph. You can mention the posted one in your resignation email, and mention the email in the posted one. Taylor discusses 6 key aspects of writing a resignation letter, including when to give notice, what to say, how to format it, and how to deliver it. A resignation letter is a way to formally end your employment and provide details such as an end date and contact information.