AMS, the Automated Manifest System, is the US Customs and Border Protection system through which carriers and NVOCCs electronically file cargo manifest data for shipments to or through the United States. For containerised ocean cargo the filing is due 24 hours before loading at the foreign port.
AMS implements the 24-hour rule: CBP screens manifest lines before the vessel sails, and can issue do-not-load messages for problem cargo. Carriers file the master manifest; NVOCCs with their own SCAC file house-level details or pass them to the carrier.
AMS data must reconcile with the ISF and later the entry; mismatched descriptions, parties, or counts across these filings are a reliable generator of holds. Amendment after filing is possible but tracked and, past thresholds, penalised.
The AMS deadline is anchored to the same physical milestone tracking watches: loading at origin. A box that misses its documentation window rolls exactly like one that misses the cargo cut-off, and the tell in TrackingMCP is identical: vessel departs, no load event. Clean AMS data upstream is what keeps the arrival side of the timeline boring.
Customs procedures and filing requirements vary by country and change over time. This page is general orientation, not customs or legal advice. Confirm current rules with your customs broker or the relevant authority.
AMS, the Automated Manifest System, is the US Customs and Border Protection system through which carriers and NVOCCs electronically file cargo manifest data for shipments to or through the United States. For containerised ocean cargo the filing is due 24 hours before loading at the foreign port.
Yes, manifest filing covers cargo destined to, and in defined cases moving through or remaining aboard in, US ports. The carrier’s filing obligations extend beyond simple imports.
A CBP instruction, issued through AMS screening before departure, telling the carrier not to load a specific shipment. The cargo stays at origin until the issue is resolved.
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