How to write a resignation letter that's effective immediately? This template provides more detailed information.In the first sentence, clearly state your intention to resign and that your resignation is effective immediately. In the opening paragraph, clearly state that you are resigning from your position. 18'h,2021 at p.m. EST. Download a free immediate effect resignation letter template, easily customizable for your personal situation. Thinking quitting your job? Save this sample resignation letter for future reference so you may leave your work in a professional way. Please accept this letter as my formal resignation. Today will be my last day of work.