How to write a resignation letter that's effective immediately? Learn how to craft a professional resignation letter without notice with our guide.Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. General Purpose Resignation Letters: Date. Dear (Manager's name),. Download the immediate resignation letter template (compatible with Google Docs and Word Online), or see below for more examples. It's time to quit the job, and you're not giving two weeks' notice. Here's how to politely write a resignation letter, effective immediately. In the opening paragraph, state your intention to resign and provide a clear date of departure. If you are submitting a print letter, please use the template on the previous page to format a business letter.