How to write a resignation letter that's effective immediately? Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation.How to Write an Immediate Letter of Resignation (4 steps). Pick the perfect wording and convey the message best suited for your situation. The purpose of this message is to inform you that I am resigning my position at EvilCorp. Use a one week's notice letter template to inform your current employer that you plan to resign within seven days. In the first sentence, clearly state your intention to resign and that your resignation is effective immediately. Please be advised that I am resigning my position with immediate effect. Regards,. Can I fill out forms in a PDF file? Republicans will have a majority in the Senate when Presidentelect Donald Trump returns to the White House in January.