Prior Disclosure CBP: The Complete Guide

A CBP prior disclosure is a voluntary self-report of a customs violation filed before CBP opens a formal investigation — and it is one of the most powerful penalty-reduction tools in U.S. import law. Used correctly, it can reduce a potential fraud penalty of four times unpaid duties down to the duties owed plus interest.

What Is a Prior Disclosure?

Prior Disclosure: A formal written notice submitted to U.S. Customs and Border Protection (CBP) by an importer, customs broker, or other responsible party that voluntarily identifies a customs violation — such as a misclassification, undervaluation, or quantity discrepancy — before CBP has initiated any formal inquiry, investigation, or audit covering those specific transactions.

The legal basis is 19 USC 1592(c)(4), which governs penalties for violations involving material false statements or omissions on customs entries. Normally, 19 USC 1592 allows CBP to assess penalties of up to 4x the unpaid duties for fraud, up to 4x for gross negligence, and up to 2x for negligence. A valid prior disclosure changes that outcome dramatically: the maximum penalty collapses to the unpaid duties plus interest, with no additional penalty multiplier.

Prior disclosure is not an amnesty program. It does not erase the violation. It does not eliminate your obligation to pay what you owe. What it does is replace a potentially catastrophic penalty with a manageable remediation — provided you file correctly and on time.

This mechanism exists because CBP cannot audit every import transaction. According to CBP’s trade statistics, U.S. ports of entry process more than 36 million formal entry summaries per year. Self-reporting reduces the agency’s enforcement burden while giving compliant importers a path to correct honest mistakes without ruinous financial consequences.

How the Prior Disclosure Process Works

The process has five discrete stages. Each stage has timing requirements that, if missed, can invalidate the entire disclosure.

Step 1: Discover the Violation

You or your customs broker identifies a material inaccuracy in one or more entries — most commonly an incorrect HTS code, an undervalued invoice, an unreported assist, or a miscalculated antidumping duty deposit. The discovery may come from an internal audit, a broker review, a change in CBP binding ruling, or a supplier’s corrected documentation.

At this point, begin a written record of when the violation was discovered and by whom. This date matters legally.

Step 2: Confirm CBP Has Not Already Initiated an Inquiry

Before filing anything, verify that CBP has not already sent a CF-28 (Request for Information) or a CF-29 (Notice of Action) referencing the entries in question, and that no formal investigation has been opened. If CBP has already initiated a formal inquiry on those specific entries, prior disclosure protection does not apply to them — even if you file the same day you discover the violation.

You can check with your licensed customs broker or contact the relevant CBP Center of Excellence and Expertise directly.

Step 3: Calculate the Unpaid Duties and Interest

Quantify the actual unpaid duties across all affected entries. Interest accrues at the IRS underpayment rate (currently in the 7–8% range annually, compounding daily) from the original entry date. Your calculation does not need to be perfect at filing — CBP regulations allow you to tender a “good faith” estimate and reconcile the final amount within 30 days — but the closer your figure is to actual, the smoother the resolution.

Antidumping and countervailing duties, if applicable, are calculated separately. The Antidumping/Countervailing Duty Orders database at enforcement.trade.gov is the reference for applicable rates.

Step 4: Submit the Written Disclosure

File the prior disclosure in writing to:

• The CBP Center of Excellence and Expertise (CEE) that liquidated the entries, or
• The CBP port director where the entries were filed

The written disclosure must include:

1. Identity of the disclosing party (importer of record, broker, or surety)
2. The specific entries affected (entry numbers, dates, port codes)
3. A clear description of the nature of the violation
4. The estimated unpaid duties and interest
5. A statement that no formal CBP investigation or inquiry has been initiated on these entries

There is no official CBP form for prior disclosure. It is a letter, submitted on company letterhead or via counsel. Retain proof of submission with a timestamp.

Step 5: Tender Unpaid Duties Within 30 Days

Once CBP accepts the disclosure as valid, you have 30 days to tender the actual unpaid duties plus interest. CBP will then issue a penalty notice at the prior-disclosure rate (duties + interest only). Pay that notice promptly. The matter is resolved without litigation, without suspension of import privileges, and without the multiplied penalty exposure you would have faced under full enforcement.

The Regulatory Framework

The core statute is 19 USC 1592, which defines penalties for customs fraud, gross negligence, and negligence. The prior disclosure provision is specifically at 19 USC 1592(c)(4).

The implementing regulations are found at 19 CFR Part 162, Subpart E — covering penalties and prior disclosure procedures. Additionally, 19 CFR Part 171 governs the petition process for penalty mitigation, which is a separate (and less favorable) route than prior disclosure.

CBP has also published formal guidance on prior disclosure in its Penalty Mitigation Guidelines, which outline how CBP field officers evaluate disclosures and what documentation they expect.

A related provision under 19 USC 1593a covers prior disclosure for export violations under the Export Control Reform Act — separate from import prior disclosure but structured similarly.

If you are working with a broker on a prior disclosure, understanding the full scope of 10 core duties of a customs broker helps clarify which party holds responsibility for the original entry and who should be named in the disclosure.

Prior Disclosure vs. Penalty Petition: A Comparison

Importers who miss the window for prior disclosure — or who are already under investigation — often pursue a penalty petition instead. The two mechanisms are not equivalent.

The data is clear: prior disclosure is structurally superior when the timing window is open. A penalty petition may achieve some reduction from fraud-level penalties, but it is never guaranteed, it takes longer, and it requires more resources.

Real-World Scenarios

Scenario 1: HTS Misclassification Discovered in Internal Audit

A textile importer discovers during a quarterly audit that its compliance team has been using an HTS code that carries a 12% duty rate instead of the correct code at 16.5% — a difference that has accumulated across 47 entries over 18 months. Estimated unpaid duties: $84,000.

CBP has not yet flagged these entries. The importer files a prior disclosure within two weeks of discovery. CBP accepts it. The importer tenders $84,000 plus approximately $9,600 in interest. Total cost: $93,600. Without prior disclosure, a gross negligence determination at 4x would have produced a penalty exposure of $336,000 — plus the underlying duties.

Scenario 2: Unreported Assists from a Foreign Supplier

A U.S. electronics importer receives tooling, molds, and design engineering work from its Chinese supplier at no charge — all of which constitute dutiable “assists” under 19 CFR Part 152. These assists were never declared on the entry summaries. A new customs broker reviewing the account identifies the issue and recommends filing a prior disclosure immediately.

The importer files within 30 days of engagement. The assists add approximately $210,000 in customs value across three years of entries, generating $31,500 in unpaid duties at a 15% blended rate. Prior disclosure limits exposure to $31,500 plus interest. Gross negligence exposure without disclosure: up to $126,000 in penalties alone.

Scenario 3: Filing Too Late

A food importer receives a CBP CF-28 Request for Information on 12 entries, asking for country-of-origin documentation. The importer, unfamiliar with the process, assumes this is routine paperwork and doesn’t alert their broker for three weeks. By the time the broker reviews the situation and identifies a material misclassification on those same entries, CBP has already formally initiated an inquiry.

Prior disclosure is no longer available for those 12 entries. The importer must pursue a penalty petition — a slower, more expensive process with no guaranteed outcome. This is the most preventable outcome in prior disclosure practice.

Experienced brokers listed by specialty on CustomsBrokerIndex.com routinely watch for CF-28s and CF-29s as part of their compliance monitoring responsibilities.

Common Mistakes and Misconceptions

Mistake 1: Assuming a CF-28 is not an “inquiry.” A CBP CF-28 (Request for Information) on the specific entries at issue does constitute the initiation of a formal inquiry. Filing a prior disclosure after receiving a CF-28 on those entries will be rejected. If the CF-28 covers different entries than those in your disclosure, you may still be protected on the non-CF-28 entries — but this requires careful legal analysis.

Mistake 2: Waiting for perfect numbers before filing. Importers sometimes delay filing while they calculate every dollar of unpaid duties with precision. This is a dangerous approach. CBP regulations allow for a good-faith estimate at filing with final tender within 30 days. File as soon as you have a reasonable approximation; refine the numbers in parallel.

Mistake 3: Thinking small violations don’t need prior disclosure. The dollar threshold that triggers enforcement interest is lower than most importers assume. CBP trade remedy enforcement teams increasingly use data analytics to identify anomalous classification patterns. A $15,000 unpaid duty discrepancy can still generate a six-figure penalty at fraud multipliers.

Mistake 4: Conflating prior disclosure with a prior disclosure for export violations. Export violations under 19 USC 1593a follow a similar structure but are handled through different CBP channels and have different timing rules. Do not file an import prior disclosure for an export-related violation, and vice versa.

Mistake 5: Not engaging a licensed customs broker or trade attorney. Prior disclosure is a formal legal process. The letter you file can be used by CBP in subsequent enforcement actions. 10 key customs broker responsibilities include compliance review and penalty mitigation guidance — tasks that directly apply here. If your current broker does not handle compliance audits, find one who does using the CustomsBrokerIndex.com broker search.

Tools and Resources for Prior Disclosure

The ACE Portal is particularly important before filing: pull your entry summary history to confirm CBP has not already queued the relevant entries for audit. Your customs broker can run this check on your behalf through their ACE access.

For importers operating near specific ports — for example, pharmaceutical importers using air cargo at JFK or automotive importers at the Port of Detroit — working with a broker who has direct relationships at the relevant port of entry can accelerate the disclosure and tendering process.

Also consider the National Customs Brokers & Forwarders Association of America (NCBFAA) as a resource for identifying qualified trade counsel with prior disclosure experience.

Frequently Asked Questions

What is a prior disclosure to CBP?

A prior disclosure is a voluntary self-report to U.S. Customs and Border Protection (CBP) in which an importer or other responsible party discloses a customs violation before CBP has initiated a formal investigation. Under 19 USC 1592(c)(4) and 19 CFR Part 162, a valid prior disclosure limits the maximum penalty to