How to write a resignation letter that's effective immediately? State your resignation and provide the effective date.The amount of notice you should give before leaving your job depends on your employment contract, company policy, and the industry you work in. Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. Here's how to resign from a toxic company. Use this simple resignation letter template when you want to quit your job. Official Seal of the State of Arizona. Contact. You have to leave right now.