We've rounded up tips and examples for writing a resignation letter that'll help you maintain work relationships long after leaving a company. In this article, we discuss how to create a 30day resignation letter, why it's important and provide a template and examples to help you write your own.We have formal resignation letter and email samples for you to follow! Learn how to write a resignation letter with a notice period. You will have to give notice of resignation to your employer. Employer obligations in a mass termination.