How to write a resignation letter that's effective immediately? Explain only what is necessary.Give a clear reason for leaving, but there is no need to over-explain. Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template. In this article, we'll provide a detailed resignation letter example to help you leave your current position on good terms. In the first sentence, clearly state your intention to resign and that your resignation is effective immediately. Below is an example of an immediate resignation letter from an employee who needed to leave their position due to severe work-related stress.