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. Below you'll find a sample resignation letter informing the employer that the employee is resigning due to a new job opportunity.This letter is my formal resignation as I move on with my career. Learn how to write a 30day resignation letter stepbystep and review sample letters and a template to help you get started on yours. I will go over a step-by-step resignation template letter you can use, how to structure it and provide examples of resignation letters. I am writing to formally notify you of my resignation from my position at PQR.