Commence your letter with a formal salutation and a concise introductory paragraph. Use one of our resignation letter templates.Give sufficient notice. You want to give at least a two weeks' notice. Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward. Nursing resignation letters are formal communications that must include specific information. Use these tips to craft a professional letter. Lastly, use a formal signoff. Division of Aging Services, SECTION NAME.