Every resigning employee shall be urged to indicate in the Resignation form the reason for leaving. Learn how to write a resignation letter with a notice period.The Frequently Asked Questions (FAQs) provided below highlight topics and specific questions that are often asked of the Illinois Department of Labor (IDOL). Understand termination letter and separation notice requirements for each applicable U.S. state with this helpful guide to stay compliant. LWC77 is most applicable when there are baseperiod claims and chargeability cases. If you do not have a contract, refer to your employer's policy about giving notice. In the opening paragraph, state that you are informing your employer that you will resign from your job in two weeks. This supports what the website of the Illinois law firm is saying.