Waiver of Overpayment

The protester appealed the denial of his application for a waiver of overpayments of foreign post differential received while he was in a locality for which post differential was not authorized. Due to an administrative error, the employee continued to receive post differential authorized at his old duty station. The denial of the waiver was sustained since the employee was partly at fault. He should have known of the overpayments since he was aware that upon transfer the post differential would terminate, and he should have expected a decrease in his gross pay.