Due to unforeseen circumstances, I must resign. Linked below are templates for resignations and retirements.In this article, we share tips for writing a short, simple resignation letter and offer examples for you to reference when creating your own. The officer must submit a letter of resignation giving of the date that (s)he wishes to resign from the public service. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. Date. Dear (Manager's name),. I am writing to officially tender my resignation from (Company name) effective (Date).