To request the payoff amount for your overpayment, send a fax to Benefit Overpayment Collections at 512-936-3799. Call a Tele-Center at 800-939-6631.Repay an Overpayment. Overpayments occur when claimants receive unemployment benefits that they were not eligible to receive. Overpayment: When a state agency finds it has paid a worker UI benefits the worker was not entitled to. If you cannot repay the entire amount, you may be able to set up a payment plan with us.