How to write a resignation letter that's effective immediately? Learn how to write a resignation letter (and what not to include) and then use our example letters as a guide.Start with the facts and be direct. I am providing this letter to serve as official notice of my immediate resignation from Davison Consulting. Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template. I am writing to inform you that I will be resigning from my position as (Title) at (Company Name). Please be advised that I am resigning my position with immediate effect. Regards,. The first section of your resignation letter should be direct and to the point. After receiving a resignation letter, the supervisor shall immediately notify the.