Discover how to craft a professional resignation letter due to illness. A resignation letter is a form that gives notice to an entity or organization of an employee's intent to quit their job.Tips for writing resignation letters for health reasons, parts to include in the letter, and some sample letters. Minnesota is an employment "at will" state. Resignation due to health issues letter example. A resignation letter form is a tool for employees who want to leave their current position for a new one. In the interest of my health and wellbeing, it is with a heavy heart that I have made the decision to resign from my position. Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward.