29 C.F.R. § 20.25 – Review of the obligation.

(a) The debtor shall have the opportunity to obtain review by the responsible agency of the determination concerning the existence or amount of the debt.
(b) The debtor seeking review shall make the request in writing to the reviewing official or employee, not more than 15 days from the date the initial demand letter was received by the debtor. The request for review shall state the basis for challenging the determination. If the debtor alleges that the agency's information relating to the debt is not accurate, timely, relevant or complete, such debtor shall provide information or documentation to support this allegation.
(c) The review shall ordinarily be based on written submissions and documentation by the debtor. However a reasonable opportunity for an oral hearing shall be provided an individual debtor when the responsible agency determines that:
1. (1) An applicable statute authorizes or requires the agency to consider waiver of the indebtedness involved, the debtor requests waiver of the indebtedness, and the waiver determination turns on an issue of credibility or veracity; or
2. (2) An individual debtor requests reconsideration of the debt and the agency determines that the question of the indebtedness cannot be resolved by review of the documentary evidence, for example, when the validity of the debt turns on an issue of credibility or veracity; or
3. (3) In other situations in which the agency deems an oral hearing appropriate. Unless otherwise required by law, an oral hearing under this section is not required to be a formal evidentiary-type hearing, although the reviewing official should carefully document all significant matters discussed at the hearing.
(d) Agencies may effect an administrative offset against a payment to be made to a debtor prior to the completion of the due process procedures required by this subpart, if failure to take the offset would substantially prejudice the agency's ability to collect the debt; for example, if the time before the payment is to be made would not reasonably permit the completion of due process procedures. Offset prior to completion of due process procedures must be promptly followed by the completion of those procedures. Amounts recovered by offset but later found not owed to the agency should be promptly refunded.
(e) Upon completion of the review, the reviewing official shall transmit to the debtor a written notification of the decision. If appropriate, this notification shall inform the debtor of the scheduled date on or after which administrative offset will begin. The notification shall also, if appropriate, indicate any changes in the information to the extent such information differs from that provided in the initial notification under § 20.22.
(f) Nothing in this subpart shall preclude an agency, upon request of the debtor alleged by the agency to be responsible for a debt, or on its own initiative, from reviewing the obligation of such debtor, including an opportunity for reconsideration of the determination concerning the debt, and including the accuracy, timeliness, relevance, and completeness of the information on which the debt is based.
(Approved by the Office of Management and Budget under control number 1225-0030)