Discover how to craft a professional resignation letter due to illness. Learn how to craft a resignation letter due to health reasonsget tips on what to include and how to write it, plus examples.I will go over a step-by-step resignation template letter you can use, how to structure it and provide examples of resignation letters. 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. This sample resignation letter is available for use on UpCounsel. Making a career change? Then you'll need to write a great resignation letter as part of the process. Mention your intention to resign and briefly outline that it is due to health reasons. There is no need to disclose specific medical details. 3.