In this article, we explain what a resignation letter is, why they're important, provide steps for writing it, and give you a template and examples. Bank Resignation Letter.Customize any of these resignation letters in minutes using our free AI-powered resignation letter builder.. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. It does not need to be very detailed, just your name, date of letter, say you quit and the last day of work (plus signature). Done. Add contact details, company name, and date.