Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. "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. It is not necessary to officially provide a reason for leaving or resigning. Explain the Reasons: Clearly and succinctly explain the reasons for the employee's dismissal.