How inventory moves through five legs - manufacturer, freight forwarder, customs, prep center, fulfillment - and where status falls through.
At a high level, an international shipment moves through the same five legs regardless of product or destination - and each leg is owned by a different party.

Between every leg there's a handoff risk and a status gap - the moment goods pass from one party to the next is exactly where updates and delays get lost. No single party sees the whole shipment end to end, so keeping each leg visible falls to the seller unless something tracks it for you.
A seller orders inventory from a manufacturer in Vietnam. The freight forwarder they've hired picks up the goods, ships them by ocean freight, and coordinates customs clearance on arrival in the U.S. Only after clearance is the shipment released for delivery to the seller's prep center, which then handles inspection, labeling, and forwarding to FBA. If the seller assumed the prep center would handle the customs step, the shipment would sit at the port with no one arranging its release.
How China prep-at-source works for Amazon FBA - what gets done before freight, who handles customs, what it costs, and how to find a vetted China prep partner.
Prep in China at the source, or import to a US prep center first? Compare cost, speed, risk, and customs for Amazon FBA, with a simple decision framework.
Post one request and connect with prep partners that match your shipment needs, services, and destination.