absolute forfeiture

[T]he forfeiture becomes absolute at the commission of the prohibited acts, and that the title from that moment vests in the United States in all cases where the statute in terms denounces the forfeiture of the property as a penalty for a violation of law, without giving any alternative remedy, or prescribing any substitute for the forfeiture, or allowing any exceptions to its enforcement, or employing in the enactment any language showing a different intent; and that in all such cases it is not in the power of the offender or former owner to defeat the forfeiture by any subsequent transfer of the property even to a bona fide purchaser for value without notice of the wrongful acts done and committed by the former owner.