Enter the resignation and effective date on appropriate employment records. Effective date of resignation: .Resignation acceptance letter template. Letter of Resignation from Employment with Acknowledgment. Learn how to write a professional two weeks notice letter with our easytouse template. A copy of the signed form must be given to the employee, and the original should be placed in the unit personnel file. It is for use in Illinois. If an employee resigns while on leave, indicate on resignation that the employee did not return from leave and also the effective date of resignation. HR and Legal will need to provide approval.