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.I have decided to resign from my job with effect from < date >. I enjoyed working here, and look forward to working with you again in future.2. 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. Hi,. Please be advised that I am resigning my position with immediate effect. Regards,. I am writing to inform you of my resignation from the Marketing Assistant position at Company A. Today will be my last day of work.