Learn how to write a professional resignation letter with our step-by-step guide and easy to use templates. When resigning for personal reasons, use the following template and examples as a starting point to write your resignation letter.It is with regret that I must inform you of my resignation. Craft a concise, professional resignation letter. Learn how to gracefully communicate your departure without oversharing details. Last Name: I would like to inform you that I am resigning from my position as Account Executive for the Smith Agency, effective August 1.