5 C.F.R. § 845.207
(a) Notice. If a debtor's response to the notice described in § 845.204(a) does not result in payment in full, payment by offset, or payment in accordance with a voluntary repayment agreement or other repayment schedule acceptable to OPM, and the debtor's rights under § 845.204 have been exhausted, OPM may report the debtor to a consumer reporting agency. In addition, a debtor's failure to make subsequent payments in accordance with a repayment schedule may result in a report to a consumer reporting agency. Before making a report to a consumer reporting agency, OPM will notify the debtor in writing that—
(b) Report. When a debtor's response to the notice described in paragraph (a) of this section fails to comply with paragraph (a)(4) of this section or the debtor does not respond, and 60 days have elapsed since the notice was mailed, OPM may report to a consumer reporting agency that an individual is responsible for an unpaid debt and provide the following information: