The following are the things to keep in mind when writing an immediate resignation letter: Write the date first. Explain only necessities.Use this resignation letter example to inform your employer that you need to resign immediately and will not be able to give two weeks' notice. I'm sorry to leave without notice. There is no legal obligation to provide notice of quitting a job or providing any kind of resignation letter. Here are steps you can take to still quit properly when you're unable to give notice, including sample resignation letters to send your boss. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. To write a resignation letter in case of an emergency, include the name of the company, your manager's name, and your name in the letter. "If you are going to resign from your position, it needs to be in writing.