Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. To write a short notice resignation letter, include your position and effective date, explain your reason and express gratitude.Simple resignation letter and email message samples to use to quit a job, as well as tips for what to write and how to resign. In this article, we share tips for writing a short, simple resignation letter and offer examples for you to reference when creating your own. In the body of the letter, immediately state your intention to resign and provide your reasoning, including only positive feelings towards your work experience.