Create an Immediate Resignation Letter without a notice period using our free printable templates. Resign with a professionally designed document.Below is a sample union resignation letter. You should check your union's constitution and bylaws to see if it is specific to whom a resignation must be sent. This resignation letter sample provides your employer with a letter for your file and also suggests that you've done everything you can to remain professional. Explore why a good resignation letter is important and how to write it, and check out our free resignation letter examples. 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. (For example, "I regret to inform you that I will be resigning from my position, effective immediately. State your intention and resignation date. Learn how to resign from a board effectively.