Here are 3 examples that you can use for resignation letter as Assistant Professor -. Resignation letters should use the formal greeting: "Dear".The first sentence in the letter should state that you are resigning and when. The letter should be signed and attached to a cover e-mail. The date of retirement would normally be the end of either the fall or spring semester. I am writing to formally tender my resignation from my position as an Assistant Professor at Crestwood High School, effective June 20, 2053. Fill out the appropriate form, obtain all required signatures, and return the form to the Office of the University Registrar. This document provides an overview of the impact on your FCPS benefit programs upon termination of employment. This document provides an overview of the impact on your FCPS benefit programs upon termination of employment. Any reliance on the information in the letters is at the reader's own risk.