Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. We've rounded up tips and examples for writing a resignation letter that'll help you maintain work relationships long after leaving a company.In this article, we share tips for writing a short, simple resignation letter and offer examples for you to reference when creating your own. Below is a sample union resignation letter. You should check your union's constitution and bylaws to see if it is specific to whom a resignation must be sent. "Learn the essential steps and tips for writing a professional two weeks notice resignation letter. "A resignation letter should be short and to the point. Simply explain why you're leaving and the date of your departure. I am writing to notify you of my resignation from my position as (job title) at (company name). The purpose of the letter is to inform the board of the decision to step down and to provide details such as the effective date of the resignation.