How Do I Know If My Shipment Needs an ISF Filing?

If you ship goods by sea to the United States, or buy goods that will be shipped there, you will hear about ISF filing. Missing it can mean penalties of up to US$5,000 per violation, holds and extra inspections.

This guide explains how to know if your shipment needs an ISF filing, what information is required, deadlines, and what Nigerian exporters need to do when selling to American buyers.

Key takeaways

• ISF (10+2) applies to ocean cargo bound for the United States, not air freight.
• It must be filed at least 24 hours before cargo is loaded at the foreign port.
• Late or inaccurate filings can attract US$5,000 liquidated damages per violation.
• Nigerian exporters must give their US buyer's broker accurate shipper data before loading.

What is ISF filing?

Importer Security Filing (ISF), often called "10+2", is a US Customs and Border Protection (CBP) requirement. It requires advance information about ocean cargo before it is loaded on a vessel heading to the United States. The aim is security: CBP screens cargo data before ships reach US waters.

Official guidance is available from CBP's ISF help article.

Does your shipment need an ISF?

Ask these questions:

1. Is the cargo going to the United States? ISF applies to cargo arriving in the US.

2. Is it moving by ocean vessel? ISF applies to ocean shipments. Air freight does not need ISF (air has separate advance data rules).

3. Is the cargo entering the US or passing through? - Cargo being imported into the US: ISF-10. - Cargo remaining on board and passing through (FROB), or moving in-bond for immediate export or transport and export: ISF-5, usually filed by the carrier.

If your shipment is ocean cargo bound for the US, assume an ISF is required unless your broker confirms an exemption.

ISF timing: the 24-hour rule

The ISF must be submitted at least 24 hours before the cargo is loaded on the vessel at the foreign port.

Two elements, container stuffing location and consolidator, can be submitted later, but no later than 24 hours before the vessel arrives at a US port.

For break bulk cargo, specific timing flexibility applies. Check with your US customs broker.

Practical point: for a shipment leaving Lagos, Onne or any other port, ISF data must be ready before loading, so your paperwork must be ready earlier than many exporters expect.

The "10", importer data elements

1. Seller (owner or purchaser) name and address. 2. Buyer (owner or purchaser) name and address.

3. Importer of record number. 4. Consignee number(s). 5. Manufacturer or supplier name and address. 6. Ship-to party name and address. 7. Country of origin. 8. HTSUS commodity code (at least 6 digits). 9. Container stuffing location. 10. Consolidator (stuffer) name and address.

The "2", carrier data elements

1. Vessel stow plan.

2. Container status messages.

These are filed by the ocean carrier, not the importer.

Who files the ISF?

The ISF importer, usually the US buyer or importer of record, is responsible. In practice, a US customs broker or forwarder files it on their behalf. If goods are sold on terms like DDP where the seller acts as importer, responsibility can shift to the seller.

What Nigerian exporters need to provide

If you export to the US, for example, agricultural products, processed foods, cosmetics, textiles or crafts, your buyer's broker will need accurate data from you before loading:

• Exact seller and manufacturer names and addresses.
• Where the container was stuffed.
• Who stuffed or consolidated it.
• Country of origin.
• Product descriptions to support HTS classification.
• Booking details: vessel, voyage and port of loading.

Delays in sending this data can cause the cargo to miss the vessel. Build it into your export documentation process.

ISF penalties

CBP can assess liquidated damages of US$5,000 per violation for late, inaccurate or missing ISF filings, with higher totals possible per filing. Consequences can also include:

• Cargo holds and "do not load" messages.
• Intensive examinations at US ports.
• Storage and demurrage costs.
• Delays in customs release.

Common ISF mistakes

• Filing after the cargo is loaded.
• Using the seller's name instead of the actual manufacturer.
• Vague or wrong commodity codes.
• Forgetting to update ISF when details change.
• Mismatch between ISF and bill of lading data.

Other advance cargo information rules to know

The US is not the only country requiring data before loading. For example:

• The European Union's ICS2 system requires advance safety and security data for goods entering the EU, including by sea.
• Nigeria requires carriers to transmit manifests electronically to Customs systems before arrival, and importers must have Form M and PAAR in place.

The trend is clear: data first, cargo second. Businesses with organised documentation clear faster everywhere.

Recent US trade changes that affect small shipments

The US has also tightened low-value imports. CBP indefinitely suspended the US$800 de minimis exemption for merchandise arriving by all modes other than the international postal network with effect from 24 June 2026 (Federal Register notice). If you sell to US customers in small parcels, expect formal entry requirements and duties.

ISF checklist for exporters shipping to the US

• Confirm with the US buyer who files the ISF and who their broker is
• Send exact seller and manufacturer names and addresses
• Confirm country of origin and product descriptions for HTS classification
• Share the container stuffing location and consolidator details
• Share booking details: carrier, vessel, voyage and port of loading
• Get confirmation that the ISF was accepted before cargo is loaded
• Update the broker immediately if anything changes

Frequently asked questions

Does air freight to the US need ISF?

No. ISF applies to ocean cargo. Air cargo has separate advance data requirements.

How early should ISF be filed?

At least 24 hours before cargo is loaded on the vessel at the foreign port. Earlier is better.

Who pays for ISF filing?

Usually the US importer, through their broker. Terms can vary by sales contract.

Can a Nigerian freight forwarder help with ISF?

Yes, by collecting accurate shipper data, coordinating with the US broker and ensuring it is sent before loading.

Export to the US with confidence

DE-BLINGS prepares complete export documentation and coordinates with overseas brokers, so your cargo meets destination rules like ISF before it sails. Explore our export documentation and sea freight services, or talk to us.