The termination process for BTS employees is the same for other project employees pursuant to Administrative Bulletin 416.3. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips.Then, state your intent to resign and exact date of departure. The employee shall specify the effective date of resignation. 1. Explore why a good resignation letter is important and how to write it, and check out our free resignation letter examples.