31 U.S.C. § 3545 — Civil action to recover money

The Attorney General shall bring a civil action to recover an amount due to the United States Government on settlement of the account of a person accountable for public money when the person neglects or refuses to pay the amount to the Treasury. Any commission of that person and interest of 6 percent a year from the time the money is received by the person until repaid to the Treasury shall be added to the amount due on the account. The commission is forfeited when judgment is obtained.