Please accept this message as my formal notice of resignation. I am fortunate to have received a long awaited opportunity that I cannot pass up.In the body of the letter, immediately state your intention to resign and provide your reasoning, including only positive feelings towards your work experience. These letters are simple and to the point. Our forms can help you make your Resignation Letter easily within minutes. 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. A one (1) week notice letter is written notification provided to an employer that an employee will no longer be working with the company within seven (7) days.