The following are the things to keep in mind when writing an immediate resignation letter: Write the date first. Explain only necessities.I'm sorry to leave without notice. 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. Virginia is an at-will state, meaning you can resign from your job at any time without giving a reason. 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. My resignation is effective immediately. The letter includes a notice of resignation at least two weeks in advance. In the body of the letter, state your intended retirement date (your last day) and your thoughts on a transition plan.