How to write a resignation letter that's effective immediately? Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template."Career Elevating" Letter: Effective today, please accept my resignation. This guide will provide you with helpful tips and advice on how to write a clear and concise resignation letter. Start with a two weeks notice letter. This will serve as a formal, written documentation of your intent to leave and your transition timeline. 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. (For example, "I regret to inform you that I will be resigning from my position, effective immediately. Give a clear reason for leaving, but there is no need to overexplain. A civil service system generally means employment in government with such positions filled on merit as a result of a competitive examination or screening.