512.25—Refunds.

(a) Refunds shall be promptly made when:

(1) A debt is waived or otherwise found not to be owed to the United States; or

(2) The employee's paying agency is directed by an administrative or judicial order to refund amounts deducted from his or her current pay.

(b) Refunds do not bear interest unless required or permitted by law or contract.

CFR