What paperwork is required for U.S. Customs Brokerage services?
In order for a U.S. Customs Broker to file a Customs entry on behalf of an importer, it must have a signed Power of Attorney in place, signed by an officer of the company. If the importer chooses to import on a continuous surety bond, an application to CBP must be filled out. By the way, an importer cannot file U.S. Customs entries on their own. An importer MUST hire a Licensed U.S. Customs broker to file U.S. Customs entries; however an importer CAN file an ISF on their own.
Moreover, Scarbrough requires a client application to be in place.
All documents can be found here: Be a Client.
An importer is also required to send (or have its supplier send) the commercial invoice and packing list to the broker. If a partner government agency (PGA such as FDA, EPA, USDA, etc.) is involved, other paperwork is required.