29 C.F.R. § 1450.10
(a) Collection by administrative offset will be undertaken in accordance with these regulations on all claims which are liquidated or certain in amount, in every instance in which such collection is determined to be feasible and not otherwise prohibited.
(b) Before the offset is made, a debtor shall be provided with the following: Written notice of the nature and amount of the debt, and the agency's intention to collect by offset; opportunity to inspect and copy agency records pertaining to the debt; opportunity to obtain review within the agency of the determination of indebtedness; and opportunity to enter into a written agreement with the agency to repay the debt. FMCS may also make requests for offset to other agencies holding funds payable to the debtor, and process requests for offset that are received from other agencies.
(4) FMCS is not authorized by 31 U.S.C. 3716 to use administrative offset with respect to:
(5) FMCS may effect administrative offset against a payment to be made to a debtor prior to completion of the procedures required by paragraph (b) of this section if:
(ii) The time before the payment is to be made does not reasonably permit the completion of those procedures.
Such prior offset must be promptly followed by the completion of those procedures. Amounts recovered by offset but later found not to be owed to the Government shall be promptly refunded.
(c) Type of hearing or review: (1) For purposes of this section, whenever FMCS is required to provide a hearing or review within the agency, the agency shall provide the debtor with a reasonable opportunity for an oral hearing when:
(ii) The 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.
Unless otherwise required by law, an oral hearing under this section is not required to be a formal evidentiary-type hearing, although the FMCS will carefully document all significant matters discussed at the hearing.