When CBP detains a shipment, the importer of record gets the notice — but the freight forwarder gets the call. Here’s how to be the one who saw it coming.
Somewhere right now, a freight forwarder is getting a call they weren’t expecting.
A shipment they moved is being held at the border under the Uyghur Forced Labor Prevention Act. The client — a company with a published ESG policy, a supplier code of conduct, and a shelf full of third-party audit certificates — has days to produce a verified, English-translated chain of custody from raw material to finished good. The clock is running, the cargo is accruing demurrage, and the client is on the phone asking the forwarder to fix it.
Read also: When Stop-and-Go Traffic Turns Into a Supply Chain Risk
They can’t. The documentation doesn’t exist.
This is the part of UFLPA enforcement the industry keeps getting wrong. The detention notice goes to the importer of record, but the operational burden — and a real share of the relationship risk — lands on the forwarder. And the exposure is growing fast. In fiscal year 2025, CBP stopped 7,325 shipments for review under the UFLPA, a 51% increase over the prior year. Only about 6.5% were ultimately released into U.S. commerce. Most of those importers genuinely believed they were clean. Their intentions weren’t the problem. Their documentation was.
For forwarders, that is not a compliance footnote. It is a commercial reality that is quietly reshaping what clients expect you to know before their cargo ever leaves the origin port.
The Gap that becomes your Problem
The dominant supply chain narrative right now is strategic: companies over-optimized for efficiency, and the fix is resilience — buffer stock, nearshoring, better technology, senior leadership at the table. All true. But there is a gap between building a resilient supply chain and being able to prove one to a federal agency at the border on a few days’ notice. That gap is where detentions happen, and it is widening.
In August 2025, the federal enforcement task force named new high-priority sectors, pushing scrutiny beyond apparel into copper, lithium, aluminum, and steel — materials buried in nearly every industrial and technology supply chain, and sectors where documentation is far less mature than in textiles. The UFLPA Entity List has expanded to 144 named companies. Translation for the forwarder: the universe of cargo that can be stopped is growing, and it now includes commodities your clients may not even think of as forced-labor exposed.
Here is the trap. Supplier-diversity programs and ESG certifications were never built to satisfy CBP’s forensic documentation standard. They answer different questions for different audiences. So the importers absorbing the highest costs are often the ones who invested most in the tools the industry recommended — and still cannot assemble an evidence package when the notice arrives. Many of them will look to their forwarder to save them.
What CBP actually asks for
To release a detained shipment, CBP wants a complete, traceable chain of custody from raw material to finished good: purchase orders, production logs, shipping records, certificates of origin and, often, laboratory test results — assembled to withstand adversarial scrutiny. Most importers have pieces. Almost none have it organized, current, and retrievable for every product line.
The scale is easy to underestimate. The Business Continuity Institute found only 17.1% of organizations mapped suppliers down to Tier 4 and beyond as of 2024. Yet a Tier 1 supplier with clean paperwork means nothing if its Tier 3 aluminum source is processing material in a restricted region. The presumption is rebuttable, but the burden of proof sits entirely with the importer — and reaches far further upstream than most compliance programs were built for.
Consider one medical-device manufacturer that mapped its full chain: 29 direct suppliers expanded to 212 at Tier 2, 1,766 at Tier 3, and 13,876 at Tier 4. Every node is a potential documentation gap. Most of your clients have no idea what their number is. Neither, until the notice lands, do you.
What to do before detention notice arrives
The forwarders who turn this into an advantage are not the ones with the fastest demurrage workarounds. They are the ones who flag the exposure before a container is sitting under detention. Five concrete moves:
- Score your book by exposure. Flag which clients move goods in high-priority sectors — cotton, polysilicon, tomatoes, and now copper, lithium, aluminum, and steel — and which source from regions or entities on CBP’s radar. That is your detention-risk heat map.
- Ask the question before the booking, not after the hold. “If CBP detained this shipment tomorrow, could you produce a raw-material-to-finished-good chain of custody, in English, within the response window?” The answer tells you exactly who is exposed.
- Pre-stage the evidence package. For high-risk clients, know now what records exist, who holds them, in what format, and how fast they can be pulled. A dry run beats a scramble against the clock.
- Put it in the contract — theirs and yours. Encourage clients to build documentation requirements into their supplier agreements, and clarify in your own terms of service where your responsibility for the evidence package begins and ends.
- Make it part of the advisory pitch. Bundle UFLPA exposure screening with routing and rate. It is a differentiator clients increasingly expect — and a reason they stay.
From Cost Center to Client Retention
The strategic plays the industry is making — just-in-case inventory, elevated supply chain leadership, AI-enabled trade platforms — are right for the long term. But they address resilience, not evidentiary readiness. What the 6.5% release rate is really telling us is that compliance has crossed a threshold: good intentions, and even good programs, are no longer enough. You have to be able to prove the supply chain, in writing, on demand, at a standard built for federal enforcement.
For forwarders, that threshold is an opening. The detention notice that blindsides one forwarder is the conversation another forwarder already had with the client three months earlier. As copper, lithium, and aluminum move under the microscope, the forwarders who win the next phase of UFLPA enforcement will not be the ones with the cleanest client supply chains.
They will be the ones who helped their clients prove it.
Author Bio
James Ferry is the founder of Ferry Trade Group, a trade compliance consultancy, and serves on the board of directors of the World Trade Center Denver. He has 25 years of experience in HTS classification, CBP enforcement, UFLPA compliance, and supply chain risk advisory.
