You want to give at least a two weeks' notice. How to Write an Immediate Letter of Resignation?Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. How to Use Two Weeks Notice Letter? In the body of the letter, immediately state your intention to resign and provide your reasoning, including only positive feelings towards your work experience. Resignation letters don't have to include the details of why you're leaving. Looking to resign with a Resignation Letter Without Notice? Use our resignation letter template for notice-period roles. If you can't do that, use vacation or accrued sick time in lieu of notice.