Customs Broker, Freight Forwarder, 3PL: Who Does What

By Bernardo Campelo, Forbes Business Council E-Commerce Leader, Amazon SPN Certified provider, Amazon SP-API authorized partner, and Founder of PrepVia.

I hear the same sentence on almost every discovery call with a new wholesale or brand account: "So you are my customs broker, right?" The answer is no, and the question itself is the problem worth writing about. In a survey of buyer language we ran on September 23, 2026, across dozens of intake calls and emails, the three roles in an import chain, freight forwarder, customs broker, and 3PL, got swapped for each other constantly. An importer signs with one provider and walks away believing he hired all three.

He did not. Each of these three businesses does a specific job, hands the shipment to the next party, and stops. Nobody owns the whole chain, and nobody is supposed to. The trouble starts in the seam between them, the point where one party's responsibility ends and the next one has not started yet, because that seam is exactly where a container sits at a port, a duty payment goes unmade, or a truck shows up at a dock with no appointment and no one who can explain why.

This is not a story about which of the three matters more. It is a map of where each one starts, where each one stops, and what usually falls into the gap in between.

What a Freight Forwarder Actually Does

A freight forwarder is a booking agent and a logistics coordinator for the physical movement of your cargo. The forwarder reserves space on a vessel or an aircraft, arranges the pickup at the factory or the consolidation warehouse, and issues the bill of lading, the document that proves the carrier took custody of your goods and agrees to deliver them. A good forwarder also tracks the container across the ocean, flags a delayed vessel before you find out from a missed delivery date, and coordinates the trucking leg once the container lands at a US port.

The forwarder is the party who knows where your container is at every stage of the voyage, and that visibility is worth paying for on its own. Freight rates move fast, capacity on a given lane tightens without warning during peak season, and a forwarder who works that lane every week has relationships with carriers that a first time importer does not.

Where the Forwarder's Job Ends

A forwarder moves cargo. A forwarder does not, by default, own the legal responsibility for getting that cargo through United States Customs. Some large forwarders also hold a customs broker license and offer both services under one roof, and that arrangement can work well, but it is a separate service on a separate line item, not something a booking fee includes automatically.

The forwarder also does not receive your goods, count them, or prepare them for a fulfillment channel. Once the container reaches the destination named on the bill of lading, whether that is a port, a rail yard, or a warehouse door, the forwarder's job is finished. What happens after the truck backs up to a dock is a different business entirely, and a surprising number of first time importers assume their forwarder is watching that part too. Nobody is watching it unless you named someone in writing.

What a Customs Broker Actually Does

A customs broker is a professional licensed by U.S. Customs and Border Protection to file the entry that legally admits your goods into the country. The broker classifies your product under the Harmonized Tariff Schedule, calculates and pays the duty owed on your behalf, and submits the entry electronically through the Automated Commercial Environment. Without that filing, a container sits at the port, and it does not move regardless of how good your forwarder is or how fast your dock is ready to receive it.

To act on your behalf, a broker needs a signed power of attorney from you, the importer of record. That document is not a formality. It authorizes the broker to make legal declarations about your shipment to the federal government, using your importer number or your Employer Identification Number, and it is the reason the broker asks for your business documents before the first container even ships. Our guide to customs documents for an FBA import lists everything a broker typically requests before an entry can be filed cleanly.

Why the Classification Decision Belongs to You

A broker files the classification, but the importer of record carries the legal liability for it being correct. A wrong HTS code that underpays duty is not the broker's mistake to absorb if Customs later audits the entry and finds the declared value or the classification does not hold up. This is one reason a DDP quote from an overseas supplier, where the supplier or their forwarder acts as importer of record instead of you, removes that liability from your side entirely, and it is also why the entry record in that arrangement belongs to them, not you. We cover that trade off in full in our piece on DDP versus DDU shipping to a prep center.

Where the Broker's Job Ends

A broker gets your goods legally admitted into the country. A broker does not move the container from the port to a warehouse, and a broker does not receive, count, or prepare what is inside it. Once the entry clears and duty is paid, the broker's statutory job is done. The container still has to move, and someone still has to open it, count the cartons, and check the freight against the packing list.

Some brokers offer trucking as an add on service, coordinating with a carrier the way a forwarder does, but that arrangement blurs two licenses into one point of contact, and it is worth confirming in writing exactly which entity is responsible for the drayage leg and who absorbs a detention charge if the truck sits too long at the port waiting for a chassis.

What a 3PL Actually Does After the Door

A third party logistics provider, a 3PL, takes physical custody of your freight once it lands at the warehouse door, after customs release and after the drayage carrier delivers it. From there, the 3PL counts the cartons against the packing list, inspects for damage, and prepares the product for wherever it needs to go next. For an Amazon seller, that preparation means FNSKU labeling, poly bagging, bundling, and building the shipment plan Amazon requires before the freight can move into a fulfillment center. For a wholesale account or a brand running its own fulfillment, it means putting inventory into a receiving system that your team, not Amazon, will draw against.

At PrepVia, this is the role we play, and only this role. Our 5,500 square foot facility in Miami runs 3 docks, and container unloading starts from $400 per container. Every carton that crosses those docks moves into our standard 24-36 hour prep window, and accounts running regular volume settle on Net-30 terms rather than paying per shipment as freight lands. That is the 3PL job: receive it correctly, document it, and get it ready to sell, on whichever channel you actually sell on. Our import to fulfillment page walks through how that receiving step connects to the freight that arrives ahead of it.

Why a 3PL Does Not Answer for Customs Release

A 3PL is not licensed to file an entry, and a 3PL is not the importer of record unless a specific, unusual arrangement makes it so, which is rare and worth avoiding for most sellers because it puts legal liability for your classification decisions onto a warehouse operator with no customs license. When a container is stuck at the port because an entry has not cleared, calling your 3PL does not move it, because the 3PL has no authority over that process and no visibility into it unless someone forwards them the tracking number.

This is the single most common frustration we hear from new accounts. A shipment is late, the seller calls the warehouse, and the warehouse has nothing to report because the delay is sitting upstream, in the customs release or the port drayage queue, in a part of the chain the 3PL was never given eyes on. The fix is not a better 3PL. The fix is a named contact who tracks the shipment end to end and tells every party, forwarder, broker, and 3PL, what is happening at each stage.

Three Roles, One Table, and the Gaps Between Them

Laid out side by side, the split of responsibility is straightforward. The part that is not straightforward is what happens in the white space between rows, because that white space is nobody's job unless somebody claimed it.

Read that last column again. Every gap is an information problem, not a competence problem. Each party does its own job well. What none of them does automatically is tell the next party in line that the handoff is coming. A forwarder who is not asked will not confirm your broker has filed. A broker who is not asked will not call your warehouse with a release date. A 3PL who is not told a truck is inbound cannot book a dock appointment, and a truck that shows up without an appointment either waits or gets turned away, and either outcome costs money.

The One Question That Closes Every Gap

Before your next container ships, ask a version of the same question of every party in the chain: who tells the next link when the handoff happens. Specifically, who tells you and your 3PL the moment the entry clears and a release date exists, and who books the delivery appointment once that date is known.

None of this requires hiring a fourth party to manage the other three. It requires deciding, in writing, before the container ships, who is responsible for telling whom. Most of the delays we see at receiving trace back to a missing notification, not a missing service. The services all existed. Nobody connected them.

What This Looks Like With a Real Container

A typical flow starts with your supplier handing the cargo to a forwarder at the origin port, who books the vessel and issues the bill of lading. While the container crosses the ocean, your customs broker prepares the entry using your packing list, invoice, and power of attorney, so the filing is ready the moment the vessel arrives. Once the container discharges at a US port, the broker submits the entry, CBP either clears it or flags it for exam, and duty is paid. Only after that release does a drayage carrier haul the container to a warehouse.

At that warehouse, your 3PL takes custody, counts the cartons against the packing list, and begins prep. If the destination is Amazon, that means labeling and building the shipment plan for the FBA inbound that leaves from the dock, not directly from the port. If the destination is your own fulfillment or a wholesale account, the product simply enters your inventory system once counted. Each of the three parties touched the shipment once, in sequence, and none of them needed to understand the others' job in detail. They only needed to know when to hand off.

If you are comparing prep centers or 3PLs for the first time, some of the same warning signs that flag a weak prep center apply here too. A warehouse that cannot describe where its job starts and stops, and who it expects to hand off with, is a warehouse that will leave you guessing the same way a vague forwarder or broker will.

Frequently Asked Questions

Is a freight forwarder the same as a customs broker?

No. A freight forwarder books and tracks the physical movement of your cargo and issues the bill of lading. A customs broker is separately licensed by U.S. Customs and Border Protection to file the legal entry that admits your goods into the country, classify the product, and pay duty on your behalf. Some large forwarders hold a broker license and offer both services, but that is two services under one roof, not one service that automatically includes the other.

Does a 3PL handle customs clearance for my shipment?

No, unless the specific 3PL also holds a customs broker license, which is uncommon. A 3PL takes physical custody of your freight after customs release and after a drayage carrier delivers it, then receives, counts, and prepares the product. If a container is delayed at the port waiting on an entry to clear, your 3PL has no authority to move it and typically has no visibility into that delay unless someone forwards them the tracking information.

Who is the importer of record when I use a prep center?

In the normal arrangement, your prep center is not the importer of record. The importer of record is either you, the buyer, under a DAP or DDU arrangement, or the delivering party under a DDP quote. Our comparison of DDP versus DDU shipping to a prep center covers exactly who carries that responsibility under each term and what changes at the dock as a result.

Why do I need a power of attorney for a customs broker?

A power of attorney authorizes your customs broker to make legal declarations to U.S. Customs and Border Protection on your behalf, using your importer number or your Employer Identification Number. Without it, a broker cannot legally file an entry for your shipment. It also confirms that you, not the broker, carry the underlying legal liability for the classification and valuation the broker submits.

What happens if nobody tells my 3PL a container is arriving?

A truck arrives without a booked dock appointment, and the warehouse either delays the unload until a slot opens or turns the truck away, and either outcome adds detention charges and pushes your prep timeline back. This is the most common gap in the entire import chain, and it is an information failure, not a service failure. Every party did its job. Nobody told the 3PL when to expect the truck.

Can one company act as my forwarder, broker, and 3PL all at once?

Some larger logistics companies bundle two of the three, most often forwarding and customs brokerage, under one roof, although each one needs its own license: an ocean freight forwarder is licensed by the Federal Maritime Commission as an ocean transportation intermediary, and a customs broker by U.S. Customs and Border Protection, so one company can hold both, but they are two licenses. A 3PL that also receives and preps your freight is typically a separate operation with its own facility and its own scope. Bundling can simplify communication, but it does not change the underlying legal split. Confirm in writing which entity is the importer of record and which entity is licensed for each function, regardless of how many logos appear on the invoice.

What should I ask a new customs broker before hiring them?

Ask who at their office will notify you the moment an entry clears, and whether they will also notify your 3PL directly rather than routing every update through you. Ask what happens if CBP flags your shipment for exam, and who pays for the delay that follows. Ask for a sample entry summary from a past shipment so you understand the format before your first real one arrives. A broker who answers these clearly is a broker who has done this before.

Final Take

The confusion between a freight forwarder, a customs broker, and a 3PL is not really confusion about what each one does. Ask most importers to define any single role and they can usually get close. The confusion is about the seams, the exact moment one party's job ends and the assumption that someone else is watching what comes next.

Nobody is watching it by default. A forwarder moves your container and stops at the destination named on the bill of lading. A broker clears your entry and stops once duty is paid. A 3PL receives, counts, and prepares your product, and has no authority over anything that happens before your freight reaches its door. Three specialists, three licenses or capabilities, and three separate stopping points.

The importers who never lose a week to a stalled container are not the ones who found a single company to do all three jobs. They are the ones who put one question in writing before the first container shipped: who tells the next party when the handoff happens. That single habit turns three separate businesses into one working chain, without asking any of them to be something they are not.

Once your goods are through the door, the remaining job is ours. Count it, document it, and get it ready to sell, on whichever channel you actually run.