Write the date first. An emergency resignation letter is a polite letter given to a business or organization that states that an employee must terminate their employment abruptly.Learn how to craft a professional resignation letter without notice with our guide. One (1) Week Notice Letter – is written notification provided to an employer that an employee will no longer be working with the company within seven (7) days. Some companies choose to pay "two weeks in lieu of notice" when they decide not to let the employee work following notice. Download a free immediate effect resignation letter template, easily customizable for your personal situation. Keep it very brief and to the point. How to write a short resignation letter? If the employer gives the employee a counternotice to shorten the notice period, this will be a dismissal. Reading Time: 7 minutes.