On June 5, 1969, Francisco Farkac Klementova entered the United States without declaring to United States Customs one lot of emerald cut stones and one ring. Klementova was indicted, tried, and acquitted of charges of violating 18 U. S. C. § 545 1 by willfully and know *233 ingly, with intent to defraud the United States, smuggling the articles into the United States without submitting to the required customs procedures. Following the acquittal, the Government instituted a forfeiture action in the United States District Court, Southern District of Florida, under 18 U. S. C. § 545 and § 497 of the Tariff Act of 1930, 46 Stat. 728, 19 U. S. C. § 1497. 2 Klementova intervened in the proceeding and argued that his acquittal of charges of violating 18 U. S. C. § 545 barred the forfeiture. The District Court held that the forfeiture was barred by collateral estoppel and the Fifth Amendment. The United States Court of Appeals for the Fifth Circuit reversed, holding that a forfeiture action pursuant to 19 U. S. C. § 1497 was not barred by an acquittal of charges of violating 18 U. S. C. § 545. We grant certiorari, affirm, and thereby resolve a conflict among the circuits as to whether a forfeiture is barred in these circumstances. 3
*234
Collateral estoppel would bar a forfeiture under § 1497 if, in the earlier criminal proceeding, the elements of a § 1497 forfeiture had been resolved against the Government.
Ashe
v.
Swenson,
Moreover, the difference in the burden of proof in criminal and civil cases precludes application of the doctrine of collateral estoppel. The acquittal of the criminal charges may have only represented “ 'an adjudication that the proof was not sufficient to overcome all reasonable doubt of the guilt of the accused.’ ”
Helvering
v.
Mitchell,
If for no other reason, the forfeiture is not barred by the Double Jeopardy Clause of the Fifth Amendment because it involves neither two criminal trials nor two criminal punishments. “Congress may impose both a criminal and a civil sanction in respect to the same act or omission; for the double jeopardy clause prohibits merely
*236
punishing twice, or attempting a second time to punish criminally, for the same offense.”
Helvering
v.
Mitchell, supra,
at 399. See also
United States ex rel. Marcus
v.
Hess,
The § 1497 forfeiture is intended to aid in the enforcement of tariff regulations. It prevents forbidden merchandise from circulating in the United States, and, by its monetary penalty, it provides a reasonable form of liquidated damages for violation of the inspection provisions and serves to reimburse the Government for investigation and enforcement expenses. In other contexts we have recognized that such purposes characterize remedial rather than punitive sanctions. See
id.,
at 401;
United States ex rel. Marcus
v.
Hess, supra,
at 549-550;
Rex Trailer Co.
v.
United States,
“Forfeiture of goods or their value and the payment of fixed or variable sums of money are other sanctions which have been recognized as enforcible by civil proceedings .... In spite of their comparative severity, such sanctions have been upheld against the contention that they are essentially criminal and subject to the procedural rules governing criminal prosecutions.” Helvering v. Mitchell, supra, at 400.
The question of whether a given sanction is civil or criminal is one of statutory construction.- Id., at 399. It appears that the § 1497 forfeiture is civil and remedial, and, as a result, its imposition is not barred by an acquittal of charges of violating § 545.
Affirmed.
Notes
“Whoever knowingly and willfully, with intent to defraud the United States, smuggles, or clandestinely introduces into the United States any merchandise which should have been invoiced, or makes out or passes, or attempts to pass, through the customhouse any false, forged, or fraudulent invoice, or other document or paper; or
“Whoever fraudulently or knowingly imports or brings into the United States, any merchandise contrary to law, or receives, conceals, buys, sells, or in any manner facilitates the transportation, concealment, or sale of such merchandise after importation, knowing the same to have been imported or brought into the United States contrary to law—
“Shall be fined not more than $10,000 or imprisoned not more than five years, or both.
“Proof of defendant’s possession of such goods, unless explained to the satisfaction of the jury, shall be deemed evidence sufficient to authorize conviction for violation of this section.
“Merchandise introduced into the United States in violation of this section, or the value thereof, to be recovered from any person de *233 scribed in the first or second paragraph of this section, shall be forfeited to the United States.
“The term ‘United States/ as used in this section, shall not include the Philippine Islands, Virgin Islands, American Samoa, Wake Island, Midway Islands, Kingman Reef, Johnston Island, or Guam.”
Title 19 U. S. C. § 1497 provides:
“Any article not included in the declaration and entry as made, and, before examination of the baggage was begun, not mentioned in writing by such person, if written declaration and entry was required, or orally if written declaration and entry was not required, shall be subject to forfeiture and such person shall be liable to a penalty equal to the value of such article.”
In
United States
v.
Two Hundred and One Fifty-Pound Bags of Furazolidone,
No. 71-1329 (1971), cert. denied,
We need not, and do not, decide whether an acquittal under § 545 bars a forfeiture under § 545.
The judge at the criminal trial specifically stated:
“He is, obviously, a sophisticated dealer in emeralds and other jewelry.
“I don’t condone nor do I approve, for one minute, what he did in this instance. I think he knew that that jewelry — that that ring and those emeralds should have been declared.
“He made a declaration of some cigarettes and some whiskey, several other little odd, meager items there, but I’m not persuaded beyond a reasonable doubt that he did what he did with the intent to defraud the United States.”
The difference in the issues involved in the criminal proceeding, on the one hand, and the forfeiture action, on the other, serves to distinguish
Coffey
v.
United States,
The District Court relied upon the following language in
United States
v.
U. S. Coin & Currency,
“But as Boyd v. United States,116 U. S. 616 , 634 (1886), makes clear, 'proceedings instituted for the purpose of declaring the forfeiture of a man’s property by reason of offences committed by him, though they may be civil in form, are in their nature criminal’ for Fifth Amendment purposes.” (Emphasis in United States v. U. S. Coin & Currency.)
Section 1497 does not result in a forfeiture by reason of the commission of a criminal offense. A forfeiture results from the act of importation without following customs procedures; no criminal offense, much less a criminal conviction, is required. Cf. id., at 718-722.
One 1958 Plymouth Sedan
v.
Pennsylvania,
