You want to give at least a two weeks' notice. In this article, we cover everything you need to know about writing a resignation letter without notice and provide an example to get you started.Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template. Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. Create an Immediate Resignation Letter without a notice period using our free printable templates. Resign with a professionally designed document. In the letter, include the date you plan to leave the company. Just keep it short and sweet. Don't go into story telling mode. How many days notice do I have to give if I am planning to resign?