Learn how to write a resignational letter if you're quitting for personal reasons. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips.We've rounded up tips and examples for writing a resignation letter that'll help you maintain work relationships long after leaving a company. In this article, we'll provide a detailed resignation letter example to help you leave your current position on good terms. Say "personal reasons" as a reason for quitting a job. I do not wish to explain in detail to my employer my reasons for leaving the job. 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.