18 U.S.C. § 512 : US Code - Section 512: Forfeiture of certain motor vehicles and motor vehicle parts

      (a) If an identification number for a motor vehicle or motor
    vehicle part is removed, obliterated, tampered with, or altered,
    such vehicle or part shall be subject to seizure and forfeiture to
    the United States unless - 
        (1) in the case of a motor vehicle part, such part is attached
      to a motor vehicle and the owner of such motor vehicle does not
      know that the identification number has been removed,
      obliterated, tampered with, or altered;
        (2) such motor vehicle or part has a replacement identification
      number that - 
          (A) is authorized by the Secretary of Transportation under
        chapter 301 of title 49; or
          (B) conforms to applicable State law;

        (3) such removal, obliteration, tampering, or alteration is
      caused by collision or fire or is carried out as described in
      section 511(b) of this title; or
        (4) such motor vehicle or part is in the possession or control
      of a motor vehicle scrap processor who does not know that such
      identification number was removed, obliterated, tampered with, or
      altered in any manner other than by collision or fire or as
      described in section 511(b) of this title.

      (b) All provisions of law relating to - 
        (1) the seizure and condemnation of vessels, vehicles,
      merchandise, and baggage for violation of customs laws, and
      procedures for summary and judicial forfeiture applicable to such
      violations;
        (2) the disposition of such vessels, vehicles, merchandise, and
      baggage or the proceeds from such disposition;
        (3) the remission or mitigation of such forfeiture; and
        (4) the compromise of claims and the award of compensation to
      informers with respect to such forfeiture;

    shall apply to seizures and forfeitures under this section, to the
    extent that such provisions are not inconsistent with this section.
    The duties of the collector of customs or any other person with
    respect to seizure and forfeiture under such provisions shall be
    performed under this section by such persons as may be designated
    by the Attorney General.
      (c) As used in this section, the terms "identification number",
    "motor vehicle", and "motor vehicle scrap processor" have the
    meanings given those terms in section 511 of this title.