In this article, we discuss how to include a reason in your resignation letter and provide some samples to guide your writing. We've rounded up tips and examples for writing a resignation letter that'll help you maintain work relationships long after leaving a company.Leaving a job isn't easy. Please accept this letter as a notice of my resignation. In the body of the letter, immediately state your intention to resign and provide your reasoning, including only positive feelings towards your work experience. Add contact details, company name, and date.