When an importer discovers a customs violation in its own past entries — an undervaluation, a misclassification, an origin error — the instinct is often to stay quiet and hope CBP never notices. That instinct is usually wrong. The customs laws offer a powerful incentive to come forward first: a prior disclosure, which can cut penalty exposure dramatically. But the window to use it closes the moment CBP begins looking, so the timing is everything.
Disclosing first can shrink the penalty to a fraction
Under 19 U.S.C. 1592(c)(4), an importer who discloses a violation to CBP before — or without knowledge of — a formal investigation receives sharply reduced penalties. For non-fraudulent violations, the penalty is generally limited to the interest on any lost duties. For fraud, it is reduced to a fraction of what it would otherwise be. The lost duties themselves must still be paid, but the punitive penalty largely falls away.
How Much a Prior Disclosure Saves
The value of coming forward is best seen by comparing the exposure with and without a valid prior disclosure. The reductions are substantial at every culpability level.
| Culpability | Without disclosure | With prior disclosure |
|---|---|---|
| Negligence | Up to two times the lost duties (or a value-based figure) | Generally limited to interest on the lost duties |
| Gross negligence | Up to four times the lost duties (or a value-based figure) | Generally limited to interest on the lost duties |
| Fraud | Up to the domestic value of the merchandise | Reduced to a fraction — generally the lost duties (or a smaller value-based figure where there is no loss) |
The pattern is clear: for non-fraudulent errors, a prior disclosure can reduce the punitive penalty to little more than interest, turning a potentially crippling exposure into a manageable one. Even for fraud, the reduction is dramatic. The exact figures depend on the facts and on whether the violation caused a loss of duties, which our page on prior disclosure of 19 U.S.C. 1592 violations details.
The Catch: Timing
A disclosure only counts if you got there first
The reduced penalties are available only if the disclosure is made before CBP has commenced a formal investigation of the violation that the importer knows about. Once CBP is already investigating and the importer knows about it, the opportunity is gone. That is why a discovered violation is time-sensitive: the longer an importer waits, the greater the risk that CBP finds it first and the prior disclosure option disappears.
What a Valid Disclosure Requires
A prior disclosure should not simply be a phone call, which CBP discourages. To qualify, it generally must be made to the right office, identify the merchandise and the circumstances of the violation, state the material facts, and be accompanied by a tender of the actual lost duties (or an arrangement to pay them). A disclosure that is vague, incomplete, or made to the wrong place may not secure the reduced penalties — so getting the substance and the mechanics right matters as much as acting quickly.
Deciding whether to disclose, and preparing a disclosure that actually qualifies, is a judgment call with real stakes on both sides. A customs and international trade lawyer can assess the violation, determine whether the window is still open, and prepare a disclosure that secures the maximum reduction. For related options after a penalty has already issued, see our penalty defense and mitigation practice.
Frequently Asked Questions
What is a prior disclosure to CBP?
It is a voluntary disclosure of a customs violation made to CBP before — or without knowledge of — a formal investigation. Under 19 U.S.C. 1592(c)(4), a valid prior disclosure sharply reduces the penalty, though the lost duties must still be paid.
How much does a prior disclosure reduce a penalty?
For negligence and gross negligence, the penalty is generally limited to the interest on any lost duties — far below the multiples that otherwise apply. For fraud, it is reduced to a fraction, generally the lost duties or a smaller value-based figure where there is no loss.
When is it too late to make a prior disclosure?
Once CBP has commenced a formal investigation of the violation and the importer knows one has begun — the prior disclosure option is lost. That is why a discovered violation should be evaluated quickly, before CBP finds it independently.
What does a valid prior disclosure have to include?
It generally must be made to the correct office, identify the merchandise and the circumstances, state the material facts of the violation, and be accompanied by a tender of the lost duties or an arrangement to pay them. An incomplete or misdirected disclosure may not secure the reduced penalties.
Found a violation in your own entries?
A prior disclosure can cut the penalty sharply — but only before CBP starts looking. A customs attorney can assess the window and prepare a disclosure that qualifies.