Write a letter of resignation. It's up to you how detailed you want to make it.Learn how to write a resignation letter (and what not to include) and then use our example letters as a guide. Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward. Write a clear, professional resignation letter with our templates and examples. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. Be sure to include your last date of work and briefly mention why you are resigning. The header at the top of the resignation letter (the same thing as a letterhead) should include your name, address, phone number and email.