Learn how to write a resignation letter with a notice period. In this article, we discuss what to include in a professional resignation letter and we share examples of resignation letters you can use for reference.Please accept this letter as a notice of my resignation. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. I regret to inform you that, after much thought, I have decided to resign. Please accept this letter as a formal notice of my resignation. A simple resignation letter format includes a resignation statement, an appropriate notice period, and an expression of gratitude. Limited Liability Partnership: File on paper and submit to our Sacramento office a Notice of Change of Status (Form LLP–4). Check out our recent blog post! Biden's letter comes in stark contrast to Trump's response to Trudeau's resignation.