5 CFR 179.305 - Agency review.
(a) A debtor may dispute the existence of the debt, the amount of the debt, or the terms of repayment. The request to review a disputed debt must be received by the OPM official identified in the notification within 30 calendar days of the debtor's receipt of the written notice described in § 179.304.
(b) If the debtor requests an opportunity to inspect or copy OPM's records concerning the disputed claim, 10 business days will be granted for the review. The time period will be measured from the time the request for inspection is granted or from the time the copy of the records is received by the debtor.
(c) Pending the resolution of a dispute initiated by the debtor, transactions in any of the debtor's account(s) maintained in OPM may be temporarily suspended to the extent of the debt that is owed. Depending on the type of transaction, the suspension could preclude payment, removal, or transfer, as well as prevent the payment of interest or discount due thereon. Should the dispute be resolved in the debtor's favor, the suspension will be lifted immediately.
(d) During the review period, interest, penalties, and administrative costs authorized under the Federal Claims Collection Act of 1966, as amended, will continue to accrue.