Importers routinely believe that because their ocean freight forwarder "filed everything", both advance filings are handled. They are separate obligations, they sit with different parties, and satisfying one does nothing for the other. Here they are side by side.
| AMS | ISF | |
|---|---|---|
| What it is | Cargo manifest transmitted to CBP | Importer Security Filing, known as 10+2 |
| Who files | Carrier for the master bill, NVOCC or forwarder for the house bill | Importer of record, usually through a broker or forwarder |
| Deadline | 24 hours before loading at the foreign port | 24 hours before loading, for standard shipments |
| Focus | Transport data: parties, ports, containers, cargo description | Commercial and origin data: manufacturer, seller, buyer, stuffing location |
| Failure mode | Do-not-load, manifest hold, cargo not released | Liquidated damages, hold, examination |
| Identifier | SCAC of the filing party | Importer of record number |
Both are advance filings, and both use vocabulary the freight glossary defines term by term. Both are due before loading. Both are usually transmitted by the same forwarder on the same day, so from the shipper's chair they look like one action. The distinction becomes visible only when something is wrong, because the fix depends on who owns the filing.
A manifest problem is corrected by the carrier or NVOCC that filed the bill. An ISF problem is corrected by the importer or their broker. If nobody is clear which filing is at fault, the container sits while both parties investigate.
The commodity description appears on both, and it must be consistent. The consignee and shipper details appear on both. The manufacturer, the seller, the ship-to party and the container stuffing location appear only on the ISF. The vessel stow plan and container status messages appear only on the AMS side and are the carrier's job.
Where the descriptions diverge, CBP notices. Two documents describing the same container differently is exactly the pattern targeting systems look for.
The details of each are in AMS filing for ocean freight and ISF filing requirements.
If you buy on FOB and control the main leg, your forwarder files the house bill in AMS and normally transmits your ISF too, using data you supply. If you buy on CIF and the supplier's forwarder controls origin, that forwarder files AMS, and your ISF still has to be filed by you or your broker. That second case is where filings get missed, because the party with the transport data is not the party with the ISF obligation.
Agree at the purchase order stage who transmits what, and get the stuffing location and manufacturer details written into your supplier onboarding.
A missing ISF risks liquidated damages and an examination. A rejected AMS description risks a do-not-load message and a missed sailing. Both risk demurrage, which is usually the larger number, and both leave a compliance record that raises the examination rate on future shipments.
No. AMS is the transport manifest filed by the carrier or NVOCC. ISF is the importer's security filing.
No. They are transmitted separately, even when the same company prepares both.
The importer of record, regardless of who transmits it.
The AMS manifest requirement discussed here applies to inbound ocean cargo. Exports have their own electronic export information requirements.
Confirm in writing who transmits the ISF. Control of the freight does not transfer the importer's filing obligation.
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