Notify Employee: The Agency must immediately notify the employee, in writing, of the amount overpaid and the method of recovery. In completing this form employees will be acknowledging in writing that their second job is subordinate to their employment with Nassau County.The salary overpayment resulted because . I hope that you will find that this section is informative and helpful. In the event I leave employment with this agency, I authorize the overpayment balance to be deducted from my final payroll payment or terminal leave cashout. Welcome to Nassau County Open Payroll. The claimant has 30 days following the date of the overpayment notification letter to invoke rights to: (a) Request a telephone conference.