Include a statement of resignation. Include your last date of employment in this section.A professional resignation letter most importantly outlines the details of your employment and departure. Example: I'm writing to inform you of my decision to resign from my position as a park ranger with the National Park Service, effective May 1st. In the opening paragraph, clearly state that you are resigning from your position. Leaving a job isn't always easy. To help, here are 10 resignation letter samples you can use when it's time to make your exit.