Learn how to write a resignational letter if you're quitting for personal reasons. Here are some of the best resignation letter examples and templates you can use to leave your job under a variety of circumstances.One resignation letter sample is designed to be concise. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. Bank Resignation Letter. Customize any of these resignation letters in minutes using our free AI-powered resignation letter builder..