"Due to health reasons, I find it necessary to resign to focus on my wellbeing. Discover how to craft a professional resignation letter due to illness.Learn how to write a resignation letter (and what not to include) and then use our example letters as a guide. Please accept this to be my notice of resignation. "For personal reasons, I have found it necessary to seek employment elsewhere and have successfully done so. 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. Dear (name of manager),. Describe the Reason. Briefly mention why you decided to resign if you feel it's necessary. Get your doctor to write a statement to the effect that it's imperative that you be released from your employment.