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.In the first sentence, clearly state your intention to resign and that your resignation is effective immediately. Please accept this letter as my formal resignation. Today will be my last day of work. This letter is to notify you that I will no longer be able to fulfil my duties as a (your role) at your company, effective from (date). I regret to inform you that I am resigning from my position here immediately as a Business Development Consultant for personal reasons. (AP) New Mexico Gov. SPECIAL REPORT: As January marks five years on from Britain leaving the EU, Alicja Hagopian and Kate Devlin explore its impact. Should Johnson come up short, it is likely the clerk will move immediately to start another roll call vote.