How to respond to CBP detention under UFLPA can mean the difference between releasing your goods and losing your entire shipment.

Your goods are sitting at the port. The clock is ticking. Customers are waiting.

This guide walks you through exactly what to do—step by step—when CBP detains your shipment under the Uyghur Forced Labor Prevention Act.

Understanding the UFLPA Detention Process

When CBP suspects your goods have connections to Xinjiang or the UFLPA Entity List, they issue a detention.

Under UFLPA’s “rebuttable presumption,” your goods are presumed to be made with forced labor until you prove otherwise.

The burden is on you—the importer—to provide “clear and convincing evidence” that your goods are clean.

The Detention Timeline

Time is critical. Here’s what to expect:

Timeline	Action Required
Day 0	Receive detention notice from CBP
Day 5	Initial response due (extension possible)
Day 30	Full evidence submission deadline
Day 30-60	CBP review period
After review	Decision: Release, Exclusion, or Seizure

Critical: If you need more time, request an extension BEFORE the deadline passes. CBP often grants reasonable extensions for complex supply chains.

Step 1: Receive and Review the Detention Notice (Day 0)

Your detention notice will include:

Entry number and date
Description of detained goods
Reason for detention (usually suspected Xinjiang origin or Entity List connection)
Response deadline
Contact information for the CBP port

Immediate Actions

Read the notice carefully – Understand exactly why CBP detained your goods
Note all deadlines – Mark them on your calendar
Notify your customs broker – They should already know, but confirm
Contact your supplier – You’ll need documentation from them fast

Step 2: Assess Your Position (Days 1-2)

Before responding, honestly evaluate your situation:

Questions to Answer

Do you have existing documentation proving non-Xinjiang origin?
Are any of your suppliers on the UFLPA Entity List?
Can you trace raw materials to their source?
Do you have third-party audit reports?
How strong is your evidence?

Possible Scenarios

Best case: You have solid documentation and can quickly compile a response.

Moderate case: You have some documentation but need to gather more from suppliers.

Challenging case: You have limited visibility into your supply chain and need to build documentation from scratch.

Step 3: Contact Suppliers Immediately (Days 1-3)

Your suppliers are your primary source of evidence. Contact them immediately requesting:

Documentation to Request

Supplier declarations – Written statements confirming goods are not from Xinjiang
Certificates of origin – For raw materials, not just finished goods
Production records – Showing where manufacturing occurred
Subcontractor information – If they use third parties
Any existing audit reports – Social compliance, supply chain audits

How to Ask

Be specific. Don’t just ask for “documentation.” Explain:

What you need
Why you need it (CBP detention)
The deadline
Exact format requirements

Vague requests lead to vague responses that won’t help your case.

Step 4: Compile Your Evidence Package (Days 3-15)

CBP wants a complete picture of your supply chain. Your evidence package should include:

1. Supply Chain Map

A clear diagram showing:

Raw material sources (specific locations)
Processing facilities
Intermediate manufacturers
Final manufacturer
Export path to US

2. Origin Evidence

Certificates of Origin (for raw materials, not just finished goods)
Country of Origin markings
Manufacturing location documentation
Specific region/province information

3. Supplier Attestations

Written declarations from each supply chain participant confirming:

No Xinjiang-sourced materials
No use of forced labor
Compliance with labor laws
Specific details about their sourcing

4. Traceability Records

Purchase orders between supply chain parties
Commercial invoices with matching quantities/dates
Bills of lading showing shipping routes
Production batch records
Lot/batch tracking documentation

5. Due Diligence Evidence

Supplier screening records (Entity List, OFAC checks)
Third-party audit reports
Social compliance certifications
Your company’s compliance policies

Step 5: Submit Your Response

Your formal response should include:

Cover letter – Summarizing your position and evidence
Evidence index – Listing all attached documents
Supply chain narrative – Explaining the journey of your goods
Organized evidence package – With clear labeling
Any expert declarations – If applicable

Submit through the method specified in your detention notice (usually CBP portal or email).

What Makes a Successful Response?

Based on CBP guidance and successful releases, winning responses typically have:

Clear and Convincing Evidence

Remember, you’re overcoming a presumption. Vague assertions don’t work. You need concrete documentation.

Complete Supply Chain Visibility

Gaps in your supply chain map raise red flags. Even if you can’t trace to raw materials, explain why and provide what you can.

Third-Party Verification

Independent audits and certifications carry more weight than supplier self-declarations alone.

Consistency Across Documents

Dates, quantities, and supplier names should match across all documents. Inconsistencies undermine credibility.

Professional Presentation

Organized, clearly labeled, easy to review. Make CBP’s job easy.

Common Mistakes to Avoid

Missing Deadlines

Extensions exist for a reason. If you can’t meet a deadline, request an extension BEFORE it passes.

Submitting Incomplete Packages

Better to request an extension than submit a weak initial package. First impressions matter.

Generic Supplier Declarations

“We don’t use forced labor” isn’t enough. Declarations should specifically address Xinjiang and include supply chain details.

Ignoring Sub-Suppliers

If your direct supplier sources from subcontractors, you need documentation about them too. CBP knows supply chains have multiple tiers.

Contradictory Evidence

Review all documents for consistency before submission. Contradictions can sink otherwise strong cases.

Emotional Appeals

Stick to facts and evidence. Arguments about business hardship or good intentions don’t overcome the legal presumption.

What Happens After Submission?

After you submit evidence, CBP will:

Review your package (typically 30-60 days)
May request additional information – Respond promptly
Make a determination

Possible Outcomes

Release: Goods cleared for import. Best outcome.

Exclusion: Goods denied entry. You can typically export them (at your cost) rather than having them seized.

Seizure: Goods seized. May lead to forfeiture proceedings.

If Your Goods Are Excluded

Exclusion isn’t the end. You typically have options:

Export the goods – Ship them to another country
Appeal the decision – If you have additional evidence
Request reconsideration – With new documentation

Consult with a customs attorney if you’re considering appeals.

Preventing Future Detentions

The best detention response is prevention. After resolving a detention:

Document lessons learned – What was missing? What worked?
Screen new suppliers before ordering
Require compliance documentation upfront, not after detention
Build relationships with verified suppliers
Consider alternative sourcing for high-risk materials

Learn more about the UFLPA compliance challenge and how to build a prevention-focused program.

Tools for Detention Prevention and Response

VettedImport helps importers:

Screen suppliers against Entity List and OFAC before ordering
Organize documentation for quick access during detentions
Generate compliance reports demonstrating due diligence
Monitor for sanctions list updates affecting your suppliers

The time to prepare is before detention, not after.

FAQs About CBP UFLPA Detention

Can I get an extension on the response deadline?

Yes, CBP often grants reasonable extensions. Request in writing before the deadline passes, explaining why you need more time.

Do I need a lawyer for a detention response?

Not always, but legal counsel helps for complex cases, high-value shipments, or if your initial response is rejected.

What if my supplier won’t provide documentation?

This is a serious problem. Document your requests and their refusal. Consider whether this supplier relationship is worth the risk going forward.

How much does detention cost?

Port storage fees typically run $500-2,000+ per day. Add potential demurrage, lost sales, and customer penalties. Detentions easily cost tens of thousands of dollars.

Can CBP detain goods multiple times?

Yes. Each shipment is evaluated independently. Successfully releasing one shipment doesn’t prevent future detentions.

What if I genuinely don’t know my supply chain origins?

This is increasingly common—and increasingly problematic. Be honest with CBP, provide what documentation you can, and start building better supply chain visibility immediately.

The Bottom Line on CBP Detention Response

Responding to a UFLPA detention is stressful, but importers succeed every day by providing solid documentation and complete supply chain evidence.

The key is speed, organization, and thoroughness.

And the best response strategy? Don’t get detained in the first place.

Build your compliance program now—screen suppliers, collect documentation, and know your supply chain before CBP asks questions.

Knowing how to respond to CBP detention under UFLPA is essential, but prevention is always better than reaction.