(a) The MSPB will refund promptly any amounts deducted to satisfy debts owed to the MSPB when the debt is waived, found not owed to the MSPB, or when directed by an administrative or judicial order.(b) The creditor agency will promptly return any amounts deducted by MSPB to satisfy debts owed to the creditor agency when the debt is waived, found not owed, or when directed by an administrative or judicial order.(c) Unless required by law, refunds under this subsection shall not bear interest.