Explain why you're leaving. Briefly explain the reasons you've decided to leave, both related to your current job and to your new position.I am writing to formally notify you of my resignation from my position at PQR. In this article, we explore some reasons why you may need to resign a job before starting and how to write an effective letter of resignation in that situation. How to write a great letter of resignation that will let you leave gracefully. Below you'll find a sample resignation letter informing the employer that the employee is resigning due to a new job opportunity. Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward. Aptitudes for specific careers through opportunities to observe and sample a variety of conditions of work. Oakland, New Jersey.