Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. In this article, we share tips for writing a short, simple resignation letter and offer examples for you to reference when creating your own.So you recently accepted a new position, now what? We'll go over how to write a resignation letter and why it's important. You might simply say, "I was recently offered a new position" or, even more simply, "I am writing to confirm my resignation. How To Write A Short Resignation Letter? Briefly mention why you decided to resign if you feel it's necessary. State your intention to resign: Clearly state in the opening paragraph that you are resigning from your position. Be direct and to the point. How to write a short resignation letter?