Use a formal business format for the actual letter itself. Notify your manager in person before you submit your formal resignation letter.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. This resignation letter sample provides your employer with a letter for your file and also suggests that you've done everything you can to remain professional. Create an Immediate Resignation Letter without a notice period using our free printable templates. Resign with a professionally designed document. Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. Employment in California is "at-will.