Learn how to write a resignational letter if you're quitting for personal reasons. I am writing to inform you of my decision to retire from my position as (Your Job Title) at (Company Name).My last day of work will be (Date). Dear Ms. Emily Clarke,. One way to leave on good terms is to write a polite, professional resignation letter in which you thank your employer for your time at the company. One way to leave on good terms is to write a polite, professional resignation letter in which you thank your employer for your time at the company. 2) Write a resignation letter. With deep regret, I am writing to inform you that I am resigning from my position as sales manager for personal reasons. I have decided to resign due to personal reasons that require my immediate attention.