Non-US sellers can sell on Amazon US through Seller Central. You need a bank account that can receive USD wire transfers or use Amazon Currency Converter, a valid government ID, and a phone number for verification.
For FBA, inventory must clear US customs before it can be sent to Amazon FCs. This requires a US customs bond, a commercial invoice, and a licensed customs broker or freight forwarder to manage the import.
Many international sellers use a Florida address — either a registered agent or a US 3PL — as their US business address for Amazon Seller Central and customs documents. This creates a US presence without establishing a legal entity.
A South Florida 3PL can serve as the US receiving point for international sellers — receiving inventory, handling prep, and shipping to Amazon FCs on the seller's behalf. This is the standard setup for overseas brands entering Amazon US.