Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. Dear (Supervisor's Name),.Craft a concise, professional resignation letter. Learn how to gracefully communicate your departure without oversharing details. Please accept this letter as formal notification of my resignation from my position as (Your Job Title) at (Company Name), effective (Date). A greeting: Start formal. A resignation letter is a formal document used to communicate your intention to terminate your employment contract. Follow proper business letter format in writing your resignation letter — just as if you were writing a cover letter seeking a new job. In the body of the letter, immediately state your intention to resign and provide your reasoning, including only positive feelings towards your work experience. (For example, "I regret to inform you that I will be resigning from my position, effective immediately.