In the body of the letter, state your intended retirement date (your last day) and your thoughts on a transition plan. Resignations. A letter of resignation including the place of future employment is required.Section 1: Complete the form and submit to your supervisor for further processing. Select One: â–¡ Adjunct (Hourly Academic). Making a career change? Then you'll need to write a great resignation letter as part of the process. Use one of our resignation letter templates. Provide your supervisor with a written letter of resignation, including the effective date of your resignation. At least 3 months prior:. For those in the biopharma industry, it's pretty common to move from one job to another throughout the course of your career.