You must complete and return the Application for Overpayment Waiver (DE 1446UI) to be considered for a waiver. Select Benefit Overpayment Services.There are several items you should make note of when you receive an unemployment overpayment notice. Overpayment: When a state agency finds it has paid a worker UI benefits the worker was not entitled to. If you need more help, contact the Benefit Overpayment Collection Section at 1-800-676-5737 during normal business hours.