Learn how to craft a resignation letter due to health reasonsget tips on what to include and how to write it, plus examples. 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. I apologize for leaving you without notice and will submit any necessary medical documentation you request. Please accept this to be my notice of resignation. I would like to help with the transition of my duties to ensure continuity after my departure.