Leaving a job isn't easy. 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.Dear Sirs: Effective immediately, I am not a member of UFCW Local 99. Basic Resignation Letter Sample. State that you wish to quit and include your final day of work. I am writing to inform you that I have made the difficult decision to resign from my position at Phoenix Realtors. This sample resignation letter is available for use on UpCounsel. Include the position title and the last day you intend to work. This does not need to be complicated a short resignation letter is the way to go. A simple resignation letter format includes a resignation statement, an appropriate notice period, and an expression of gratitude.