Published July 13, 2026. ISF (Importer Security Filing) violations are one of the most common — and most expensive — compliance mistakes in ocean freight. A single late or inaccurate filing costs $5,000. Here’s everything you need to know.
What Is ISF (Importer Security Filing)?
ISF, also known as ’10+2,’ is a mandatory data filing that U.S. importers must submit to CBP at least 24 hours before cargo is loaded aboard a vessel at a foreign port destined for the United States. Established by the SAFE Port Act of 2006 and enforced since 2009, ISF is CBP’s primary tool for advance cargo targeting and national security screening of ocean freight.
The ’10+2′ refers to the 10 data elements the importer must provide and the 2 elements the carrier must provide (vessel stow plan and container status messages). CBP uses ISF data in its Automated Targeting System (ATS) to identify high-risk shipments for examination before they arrive at a U.S. port.
The 10 ISF Data Elements — What You Must File
Importer-Provided Elements (10)
- Seller: Name and address of the entity selling the goods
- Buyer: Name and address of the entity buying the goods
- Importer of Record number: CBP-assigned IRS EIN or CBP-assigned number
- Consignee number: IRS EIN or CBP-assigned number of the party receiving the goods
- Manufacturer (or supplier): Name and address of the entity that last manufactured or assembled the goods
- Ship to party: Name and address of the first deliver-to party in the U.S.
- Country of origin: Country where the goods were manufactured or substantially transformed
- HTS-6 (commodity HTSUS number): At minimum, the first 6 digits of the HTS code; 10-digit codes are best practice
- Container stuffing location: Name and address where goods were loaded into the container
- Consolidator: Name and address of the party that stuffed the container
Carrier-Provided Elements (2)
- Vessel stow plan: A plan showing where each container is positioned aboard the vessel
- Container status messages: Status updates on container movements (gating in/out, loading, discharge)
The $5,000 Penalty — What Triggers It
CBP can assess a penalty of up to $5,000 per violation for ISF non-compliance. Violation types include:
- Late filing: ISF submitted less than 24 hours before vessel loading
- No filing: ISF not filed at all before vessel arrival
- Inaccurate data: Any of the 10 data elements contains materially incorrect information
- Incomplete filing: Required fields left blank or filed with placeholder data
- Untimely amendment: A filed ISF not updated when information changes before arrival
Common ISF Mistakes and How to Avoid Them
Mistake 1 — Waiting for the booking confirmation: Many importers don’t start ISF preparation until they receive the vessel booking, which is often too close to the loading date. ISF preparation should begin as soon as the purchase order is placed.
Mistake 2 — Using placeholder data: Filing ISF with ‘TBD’ or generic manufacturer addresses is a violation. Gather supplier and manufacturer details from your purchase order documentation.
Mistake 3 — Wrong country of origin: Particularly relevant for goods assembled from components of multiple origins. The country of origin must reflect where substantial transformation occurred — not just where the supplier is located.
Mistake 4 — Missing the container stuffing location: This is the location where goods were loaded into the container — which may differ from the manufacturer’s address if goods were transported to a consolidation facility.
Mistake 5 — Not updating for shipment changes: If routing, vessel, or supplier information changes after ISF is filed, it must be amended promptly. An ISF with outdated data is treated as inaccurate.
ISF and the Current Trade Environment
ISF compliance is more important than ever in 2025–2026. CBP’s Automated Targeting System uses ISF data to score shipments for national security and trade compliance risk. Shipments with late, incomplete, or inaccurate ISF data receive higher ATS risk scores — which directly increases the probability of physical examination upon arrival at the U.S. port.
With CBP exam rates already elevated in 2025–2026, having a clean ISF record is one of the most cost-effective ways to reduce your exam selection rate. An experienced customs broker who files ISF proactively, accurately, and on time is not just an expense — they’re insurance against exam fees, demurrage, and penalty assessments.
Accurate ISF Filing — Protect Your Ocean Shipments
FreightClear.com’s customs brokers file ISF for every ocean import client — accurately, on time, and in full compliance with CBP requirements. Avoid the $5,000 penalty.
