How to write a resignation letter that's effective immediately? 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.Write a letter of resignation. It's up to you how detailed you want to make it. Use this resignation letter example to inform your employer that you need to resign immediately and will not be able to give two weeks' notice. Keep it very brief and to the point. Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. This illustration offers tips for writing a resignation letter without notice including "Speak to your. I wish you both great success going forward. In the meantime, please let me know if I can assist you in any way during this transition period. Sincerely,.