Discover how to craft a professional resignation letter due to illness. Tips for writing resignation letters for health reasons, parts to include in the letter, and some sample 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. The complete guide to writing a nursing resignation letter with tips, examples, and templates. A resignation letter is a way to formally end your employment and provide details such as an end date and contact information. 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. There is no payment for unused sick leave.