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. In this article, we share tips for writing a short, simple resignation letter and offer examples for you to reference when creating your own.Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. Don't write anything negative in the resignation letter 1 regardless of circumstances. Just write the letter as you would normally do and be done with. Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward. Dear Mr. President,. I regretfully have to inform you that, after much thought, I have decided to resign and please accept this letter as a formal notice of my resignation. Dear (HR Manager's Name),.