How to write a resignation letter that's effective immediately? Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template.Below is an example of an immediate resignation letter from an employee who needed to leave their position due to severe work-related stress. 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. A program to help you complete the forms to resign as an agent for power of attorney. Start with a proper greeting: Address your resignation letter to your immediate supervisor or manager. An Immediate Resignation Letter is a notice that tells a manager or employer of an employee's intention to terminate their employment with immediate effect. Start with a Formal Letter format, addressing your manager or HR directly.