31 CFR § 904.4 - Minimum amount of referrals to the Department of Justice.
(a) Agencies shall not refer for litigation claims of less than $2,500, exclusive of interest, penalties, and administrative costs, or such other amount as the Attorney General shall from time to time prescribe. The Department of Justice shall promptly notify referring agencies if the Attorney General changes this minimum amount.
(b) Agencies shall not refer claims of less than the minimum amount unless:
(1) Litigation to collect such smaller claims is important to ensure compliance with the agency's policies or programs;
(2) The claim is being referred solely for the purpose of securing a judgment against the debtor, which will be filed as a lien against the debtor's property pursuant to 28 U.S.C. 3201 and returned to the referring agency for enforcement; or
(3) The debtor has the clear ability to pay the claim and the Government effectively can enforce payment, with due regard for the exemptions available to the debtor under state and Federal law and the judicial remedies available to the Government.
(c) Agencies should consult with the Financial Litigation Staff of the Executive Office for United States Attorneys in the Department of Justice prior to referring claims valued at less than the minimum amount.