Explain why you're leaving. Briefly explain the reasons you've decided to leave, both related to your current job and to your new position.Although I have greatly valued the opportunity to work with you, unfortunately, this is an opportunity I cannot turn down. Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. I would not give any reason for leaving. Due to unforeseen circumstances, I must resign. The purpose of this message is to inform you that I am resigning my position at EvilCorp. If you're planning to quit your job here is the compilation of the best resignation letter samples to help you easily draft your resignation letter. A two (2) weeks notice resignation letter is the most common letter used when notifying an employer of an official resignation. These top samples of resignation letters for personal reasons can be used as helpful templates when you are looking to resign due to personal circumstances.