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. 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. 20 sample resignation letters due to health issues to provide you with guidance and assistance for resigning gracefully and professionally. The document provides three sample resignation letters of varying levels of detail. Was this document helpful? Share it with your network! 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. A resignation letter form is a tool for employees who want to leave their current position for a new one.