49 CFR § 89.45
Department determination
November 18, 2020
(a) Following review of the information, the Department notifies the debtor with a written decision that includes the supporting rationale.
(b) If the Department either sustains or amends its determination, it shall notify the debtor that the debt is being referred to the IRS for offset against the debtor's Federal income tax refund. If the Department determines that there is no legally enforceable debt or that full payment has been made, the case will be closed.