CFR /  Title 45  /  Part 1150  /  Sec. 1150.21 May I ask the Endowment to waive an overpayment that

Yes. The regulations in this subpart do not preclude you from requesting waiver of an overpayment under 5 U.S.C. 5584 or 8346(b), 10 U.S.C. 2774, 32 U.S.C. 716, or other statutory provisions pertaining to the particular debts being collected.