Here are 3 examples that you can use for resignation letter as Assistant Professor -. To help you draft your resignation letter like the example above, here's a checklist of what to include: What to include in a resignation letter.An effective resignation letter includes your name, your job title and your departure date. Resignation letters should use the formal greeting: "Dear". The first sentence in the letter should state that you are resigning and when. An exempt monthly-paid staff member is expected to give at least four (4) weeks notice. Notice should be in writing. A faculty member who wishes to retire or resign from the University must communicate this in writing to their academic unit head. The first paragraph of a typical business letter is used to state the main point of the letter. I want to inform you that due to some personal reason I left the institute.