How to write a resignation letter that's effective immediately? In the first sentence, clearly state your intention to resign and that your resignation is effective immediately.Here are steps you can take to still quit properly when you're unable to give notice, including sample resignation letters to send your boss. Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward. Dear Ms. Emily Clarke,. I hope this message finds you well. A resignation letter that takes a bit more time to outline your growth as a result of your employment. Please accept this letter as my formal resignation. Today will be my last day of work.