The Importer Security Filing — commonly abbreviated as ISF and also known as “10+2” — is a data filing requirement administered by U.S. Customs and Border Protection for ocean cargo destined for the United States. The ISF must be transmitted to CBP at least 24 hours before cargo is loaded onto a vessel at the foreign port of departure. The requirement applies to most ocean shipments entering the U.S. and is separate from the entry filing submitted at the time of importation.
The ISF exists as part of CBP’s cargo security screening program — it gives CBP the advance data it needs to assess whether a particular shipment poses a security risk before it ever arrives in the United States. That security function is why the penalties for non-compliance are so significant and why CBP enforces the requirement strictly.
What Data Elements Are Required?
The “10” in 10+2 refers to ten data elements that must be submitted to CBP no later than 24 hours before the cargo is loaded onto the vessel at the foreign port. These are:
- Seller
- Buyer
- Importer of record number or FTZ applicant identification number
- Consignee number(s)
- Manufacturer or supplier
- Ship-to party
- Country of origin
- Commodity HTS number
- Container stuffing location
- Consolidator
The “2” refers to two additional data elements — container stuffing location and consolidator — that must be submitted as early as possible but no later than 24 hours prior to the vessel’s arrival at a U.S. port. These two elements are often not known at the time of loading, which is why they have a later deadline, but they must still be provided before the ship docks.
Accuracy matters as much as timeliness. An ISF that is filed on time but contains incorrect information — wrong HTS number, wrong country of origin, wrong manufacturer — is treated as an inaccurate filing and subjects the importer to the same penalties as a late or missing filing.
What Are the ISF Penalties?
CBP may issue liquidated damages for ISF violations — technically liquidated damages rather than penalties, though the practical distinction matters less than the dollar amounts. The exposure is significant:
- $5,000 per violation for a late, inaccurate, or incomplete ISF filing
- $10,000 per violation for a repeat violation
Each shipment is a separate potential violation. An importer with multiple non-compliant shipments can accumulate ISF liquidated damages quickly. CBP also has the authority to withhold release of the cargo or require an intensive examination of the shipment when an ISF is late or missing — adding delay and examination costs on top of the liquidated damages exposure.
ISF violations are tracked in CBP’s systems, which is why repeat violation rates double. An importer who receives a first violation and does not correct their filing procedures is in a significantly worse position the second time around.
Can an ISF Penalty Be Reduced?
Yes — and in most cases it can be reduced substantially. The $5,000 or $10,000 liquidated damages amount is CBP’s opening position, not a final bill. By filing a petition for mitigation with CBP, importers can typically reduce these amounts significantly. Based on our experience with these cases, a well-prepared petition on a first violation generally achieves a result in the range of $1,000 to $2,000. For a second violation, a good outcome is typically around $2,500.
The factors CBP considers in evaluating ISF mitigation include the importer’s compliance history, whether the violation was isolated or part of a pattern, whether the cargo posed any actual security concern, and whether the importer has taken corrective steps to prevent future violations. Demonstrating that the violation was an isolated administrative error — rather than a systemic compliance failure — and showing that you have implemented procedures to prevent recurrence both support a stronger mitigation outcome.
What If the Notice Says Mitigation Is Not Recommended?
File the petition anyway. In our experience, language in a liquidated damages notice stating that “mitigation is not recommended” is frequently included to discourage petitions and encourage full payment. It is not a binding determination. We have successfully obtained reductions on ISF liquidated damages even when the notice contained that language. Do not treat it as the end of the road — treat it as CBP’s opening position and respond accordingly.
ISF Compliance Going Forward
For importers who have received an ISF violation, the penalty response is only half the issue. The other half is ensuring it does not happen again. ISF filings are typically handled by customs brokers or freight forwarders, and violations often result from breakdowns in communication between the importer and their logistics providers — missing supplier information, late transmission, or incorrect HTS numbers provided by the foreign manufacturer. A customs attorney can help you evaluate whether your current filing procedures adequately address the regulatory requirements and identify where your process may be vulnerable to future violations.
If you have received an ISF liquidated damages notice, contact us for a quote on filing a petition for mitigation. Call us at (734) 855-4999, send a text message, or reach us on WhatsApp. You can also contact us online.