CBP Customs Detention: Notice, Deadlines, and Importer Options

When U.S. Customs and Border Protection holds your imported goods, that hold is called a CBP customs detention, and federal law puts it on a clock. CBP must either release your shipment or formally exclude it within 30 days of the date the merchandise was first presented for examination, and it must tell you in writing why the goods are being held.¹ Miss neither the notice nor the deadlines: they are the two levers you have.

What the Notice of Detention Must Say

A detention is not a final ruling. It means CBP has concerns and has opened an administrative process where you can respond before the agency decides whether your goods can enter.²

The written Notice of Detention must include five things:

The date the merchandise was presented for examination, which starts the 30-day clock.
The specific law or regulation CBP believes your shipment may be violating.
How long CBP anticipates the hold will last.
What tests or inquiries CBP plans to conduct.
What information from you could resolve the detention faster.

Read the fifth item as a roadmap. CBP is telling you what evidence would address its concerns, and importers who respond to that specific ask tend to move faster than those who send a generic document package.

The Deadlines CBP Has to Meet

The statute stacks three deadlines on top of each other, and none of them run at CBP’s discretion.

Five Business Days to Decide

CBP has five business days from the date your merchandise is presented for examination to decide whether to release or detain it. If the goods are not released in that window, they are automatically treated as detained under the statute.¹

Five More Business Days to Send the Notice

Once CBP detains the merchandise, or once the initial five-business-day window expires without release, the agency has another five business days to issue the written Notice of Detention to the importer and any other party with an interest in the goods.²

Thirty Days Before Deemed Exclusion

The outer limit is 30 days from the date the merchandise was presented for examination. If CBP fails to make a final admissibility determination within that window, the law treats the silence as a decision to exclude the goods. This “deemed exclusion” carries the same legal weight as a formal exclusion order, and you can challenge it through the same protest and court processes.¹ The provision exists so cargo does not sit in limbo indefinitely.

What You Can Do While Your Goods Are Held

You are not a passive bystander during a detention. Several rights are built into the process.

Get the Test Results

If CBP tests your merchandise, you can request copies of the results along with a description of the testing procedures and methods, in enough detail to replicate the tests and analyze the results independently. The only carve-out is where the methodology is proprietary or was developed by CBP specifically for enforcement.¹

Have a Sample Tested Yourself

You can request that CBP release a representative sample so a private laboratory accredited under CBP’s testing program can test it at your expense. If no CBP laboratory has tested the goods, your accredited lab’s results must be accepted as long as you certify the sample came from the shipment in question.³ This is one of the most underused tools importers have. When CBP has not run its own lab work, your independent results can effectively become the factual record.

Respond to the Notice

A strong response addresses the specific reason CBP flagged the shipment. Depending on the concern, that can mean commercial invoices showing the purchase price and product descriptions, packing lists confirming quantities, bills of lading tracing the shipment’s journey, certificates of origin, or lab results demonstrating compliance with safety or manufacturing standards. Entry numbers, Harmonized Tariff Schedule codes, and manufacturer information should match across every document. Inconsistencies between your invoice and your entry filing are exactly the kind of thing that extends a hold.

Submit electronically through CBP’s Document Image System, which accepts PDFs and image files through secure web services, file transfer protocol, or email, and routes them to the reviewing officer faster than paper submissions.⁴ Responses go to the Port Director or the Center of Excellence and Expertise handling that category of merchandise.

Costs That Pile Up During a Hold

The financial exposure runs well beyond the value of the goods, and most of it falls on you.

Examination Station Fees

If your container is routed to a Centralized Examination Station for physical inspection, the facility charges for drayage, gate access, breaking and resealing container seals, labor to unload and reload, and daily storage after any free time expires. Refrigerated cargo runs higher. The total can range from a few hundred dollars to well over a thousand depending on container size and how long the exam takes.

Demurrage and Detention Charges

Ocean carriers and terminal operators typically keep charging demurrage (for containers sitting at the terminal) and detention (for containers held beyond the free period) even while CBP has your cargo on hold. A government hold does not automatically pause these charges. The Federal Maritime Commission has said these practices should be evaluated for reasonableness in the context of government inspections, and the charges arguably should not apply when you cannot retrieve or return a container because of government action.⁵ Contesting them means documenting the unavailability: screenshots of terminal appointment systems, hold codes from the carrier, and CBP notices showing the government prevented pickup. Without that paper trail, carriers rarely waive.

Bond Exposure

Your customs bond stays on the hook. If detained merchandise is disposed of without CBP’s written permission, your bond requires redelivery within 30 days of CBP’s demand, and liquidated damages for failure to redeliver run to three times the merchandise value.⁶

When Other Agencies Are Behind the Hold

CBP is not always the agency driving the detention. The FDA can hold food, drugs, cosmetics, and medical devices. The Consumer Product Safety Commission reviews consumer goods for safety violations. The EPA can flag shipments for environmental compliance. The Fish and Wildlife Service handles wildlife products. The National Highway Traffic Safety Administration reviews vehicle imports.⁷ When a partner agency initiates the hold, the 30-day deemed-exclusion clock under 19 USC 1499 does not apply if admissibility is vested in that other agency rather than CBP.¹ Partner-agency holds can therefore drag on considerably longer, and you may need to satisfy that agency’s requirements rather than CBP’s alone.

Forced Labor Holds Under the UFLPA

Detentions under the Uyghur Forced Labor Prevention Act operate on different rules. The UFLPA creates a rebuttable presumption that goods mined, produced, or manufactured in the Xinjiang Uyghur Autonomous Region, or by any entity on the UFLPA Entity List, were made with forced labor and are banned from entry.⁸ The burden of proof runs against you: to get an exception, you must provide clear and convincing evidence that no forced labor was involved, comply with the Forced Labor Enforcement Task Force’s guidance to importers, and respond fully to CBP’s supply-chain inquiries.⁹ Clear and convincing is a higher bar than the usual preponderance standard. If your supply chain does not involve Xinjiang or any listed entity at all, you can request an applicability review through CBP’s Forced Labor Division Review Requests Portal to show the presumption does not apply to your shipment.¹⁰

If the Detention Becomes an Exclusion or Seizure

A detention can end three ways. CBP can release the goods. It can deny entry without seizing them, in which case you export at your own expense.² Or it can seize the goods when review confirms a violation, with formal notice from the Fines, Penalties, and Forfeitures office at the port of seizure.¹¹ All follow-up communication runs through that FP&F office, and you will need the seizure number assigned when the goods were taken.

Filing a Protest and Getting to Court

If CBP excludes your merchandise, or the 30-day deadline passes without a decision and creates a deemed exclusion, you can file an administrative protest with CBP within 180 days of the exclusion.¹² The protest identifies the decision you are challenging and explains why the exclusion was wrong.

If CBP denies the protest, or does not act on it within 30 days, you can take the case to the U.S. Court of International Trade, which has exclusive jurisdiction. When the case involves a deemed exclusion from a missed 30-day deadline, the court applies a favorable standard for importers: unless CBP can prove by a preponderance of the evidence that it had good cause for not reaching a decision in time, the court must grant appropriate relief, including ordering CBP to cancel the detention and release the goods.¹ The burden shifts to the government to justify its delay, and that is a meaningful advantage when your cargo has been stuck with no resolution in sight.

1
Office of the Law Revision Counsel. 19 USC 1499 – Examination of Merchandise
2
eCFR. 19 CFR 151.16 – Detention of Merchandise
3
Office of the Law Revision Counsel. 19 USC 1499 – Examination of Merchandise
4
U.S. Customs and Border Protection. ACE Basics – Document Image System
5
eCFR. 46 CFR 545.5 – Interpretive Rule
6
eCFR. 19 CFR Part 113 Subpart G – CBP Bond Conditions
7
U.S. Customs and Border Protection. Partner Government Agencies Import Guides
8
U.S. Customs and Border Protection. Uyghur Forced Labor Prevention Act Statistics
9
U.S. Customs and Border Protection. FAQs – UFLPA Enforcement
10
U.S. Customs and Border Protection. Forced Labor Division Review Requests Portal Quick Reference Guide
11
U.S. Customs and Border Protection. Seized Property – Status and Returns
12
Office of the Law Revision Counsel. 19 USC 1514 – Protest Against Decisions of Customs Service