If the employer determines that the evidence is not satisfactory, the employer shall notify the employee immediately that the termination will remain in effect. How to write a resignation letter that's effective immediately?They're just accepting her resignation effective immediately. Do you have a citation to Illinois law on this? C. Resignation the voluntary separation of an employee from their position with the Department, prior to completing 20 years of ISP service. Employers may also want to consider the impact an immediate separation would have on remaining employees. Any person desiring to resign from his position in the department shall submit two executed copies of such proposed resignation to the board. This sets the tone and leaves no room for ambiguity.