Explain why you're leaving. Briefly explain the reasons you've decided to leave, both related to your current job and to your new position.Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. Here's how to write a resignation letter when you're quitting for a job with a better compensation package, and you want to provide your employer with a reason. "Learn the essential steps and tips for writing a professional two weeks notice resignation letter. Use one of our resignation letter templates.