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 a factual statement of departure, without emotion, anger, threats, or reasons for leaving," Caprino says. It's been a great experience working in your company for two years. S A M P L E R E S I G N A T I O N L E T T E R. December 1, 2008. Communicate Timely – Who Needs to Know? I am writing to officially tender my resignation from Sunshine Tech Solutions, effective November 15, 2023.