We will send you a Notice of Potential Overpayment (DE 1447) when our records show that you may have been paid for benefits you were not eligible to receive. The salary overpayment resulted because .How do I request a refund? A. Fill out the Business Tax Refund Request form to request a refund from the City for an overpayment. Overpayment from the employee's paychecks, five percent. Contact the Benefit Overpayment Collection Section at 1-800-676-5737 during normal business hours of 8 a.m. To make repayment arrangements, please contact ____________________ within XX days of the Date of Notice. Recycling service refunds are now available through the City of Oakland to the owners of many multifamily rental properties in the city.