Discover how to craft a professional resignation letter due to illness. Want to quit your job due to health problems?Know how to write the perfect resignation letter due to health issues, with this guide and multiple samples. In this article, we'll give you practical tips, examples, and a resignation letter template to help you navigate the process with confidence and ease. 20 sample resignation letters due to health issues to provide you with guidance and assistance for resigning gracefully and professionally. This sample resignation letter is available for use on UpCounsel. A simple resignation letter format includes a resignation statement, an appropriate notice period, and an expression of gratitude. President Jimmy Carter (right) and wife Rosalynn sit in the sanctuary at Maranatha Baptist Church in Plains, Georgia.