---
content_id: international-shipping-cbp-notice-of-detention-or-seizure
canonical_url: https://11tracking.com/international-shipping/cbp-notice-of-detention-or-seizure/
title: "CBP Detention or Seizure Notice for a Package: Verify the Notice and
  Find the Official Route"
meta_description: A CBP detention notice and seizure notice are different formal
  states. Verify the notice independently, identify the controlling official
  system, preserve case-specific dates privately, and stop before legal
  strategy.
language: en
published_at: 2026-08-15
last_reviewed: 2026-08-15
carrier_scope:
  - U.S. Customs and Border Protection formal detention and seizure notice/case
    records
  - FDA import detention only as an other-agency boundary counterexample
jurisdiction_scope:
  - United States
---


# CBP Detention or Seizure Notice for a Package: Verify the Notice and Find the Official Route

A **CBP Notice of Detention** and a **CBP Notice of Seizure** are not the same state.

A detention notice can still be part of an admissibility or release process. A seizure notice means the property has entered a formal U.S. Customs and Border Protection seizure case, with the case routed through **Fines, Penalties and Forfeitures (FP&F)**.

The safe first step is not to guess what the notice means from a tracking update, seller message, or internet deadline. Verify the notice through an independent official government channel, identify the exact office and case system named by the notice, preserve its dates and instructions privately, and follow that official process.

This page stops before choosing a legal response option for you.

## Use this page only after a formal CBP notice is verified

This guide is for a narrow situation:

- you have a **Notice of Detention**, **Notice of Seizure**, or another formal CBP case object;
- the object has been authenticated or independently verified through an official CBP channel; and
- your main question is what state the case is in and which official system controls the next step.

Do **not** enter this workflow merely because:

- a seller says “customs seized it”;
- tracking stopped at customs;
- a carrier says the shipment is under customs review;
- an unsolicited caller or email says CBP has your package.

Those facts can be important, but they do not establish the same formal enforcement object.

If there is no authenticated formal notice and the shipment is simply under customs review, use [Package Stuck in Customs](/package-problems/package-stuck-in-customs/). If an authoritative record says clearance failed or the shipment became customs-related undeliverable but there is no formal detention or seizure object, use [Customs Clearance Failed or Package Became Undeliverable](/package-problems/customs-clearance-failed-return-storage-or-disposal/).

## First verify the notice independently

Treat notice authenticity as a separate question from the shipment problem.

A useful evidence order is:

1. **Identify the issuing agency and notice type.**
2. **Do not rely only on contact details inside an unverified message.**
3. **Confirm the issuing office through a current official government channel.**
4. **Only after verification classify the notice as detention, seizure, or another agency's process.**

CBP warns that unsolicited calls or emails claiming it is holding a package can be fraudulent. It also warns that consumers are sometimes told goods are with CBP when that is not actually the case.

For CBP seizure cases, current CBP guidance routes case questions to the FP&F office associated with the port where the property was seized. Use the office identified by the verified notice and confirm it through current official CBP records rather than copying a contact from an unrelated case.

If the communication is still suspicious and you have not authenticated a formal government object, use [Is This Delivery Text, Email, Fee, or Tracking Link a Scam?](/package-problems/fake-delivery-message/) before treating the message as a CBP case.

## Detention and seizure branch in different directions

The common steps are authentication, evidence preservation, and official routing. After that, the two states must separate.

| Formal object | What it means at this level | What this page can safely tell you |
| --- | --- | --- |
| **Notice of Detention** | A formal detention exists. In the reviewed CBP international-mail model, admissibility or release can still remain unresolved. | Read the exact reason and instructions in the notice, identify the controlling CBP office, and determine whether a specific cure or entry dependency is still open. |
| **Notice of Seizure** | Property has entered a formal seizure case. Current CBP guidance routes the case through FP&F. | Verify the notice and case office, preserve the case reference and notice-specific instructions, and use the official case route. |
| **Notice from FDA or another federal agency** | The import problem may be controlled by a different agency even though the package passed through customs. | Exit the CBP workflow and use the exact issuing agency's official process. |

There is no safe universal shared response workflow after these two branches.

## What a CBP Notice of Detention means

For international mail, CBP distinguishes a formal Notice of Detention from an ordinary missing-package or tracking problem.

CBP's current mail guidance says that when it detains a package for reasons such as missing documentation, a possible trademark issue, or a formal-entry requirement, the relevant CBP International Mail Branch can notify the recipient in writing of the reason and how release may be obtained.

That supports two important boundaries:

**detention ≠ seizure**

and:

**detention ≠ always irreversible**

But it does **not** mean every detention can be fixed or that supplying one document guarantees release. The exact notice and the governing process control what remains possible.

If the controlling task becomes a specific verified document or identity request, use [Customs or Carrier Asks for ID, Tax Number, Invoice, or Proof](/international-shipping/customs-asks-for-id-tax-number-invoice-or-proof/).

If the controlling task is instead a broker, formal-entry, importer/filer, power-of-attorney, or bond dependency, use [Why Does My Package Need a Customs Broker, Formal Entry, or Power of Attorney?](/international-shipping/customs-broker-formal-entry-power-of-attorney/).

## What a CBP Notice of Seizure means

Current CBP seized-property guidance says a formal seizure case is referred to **Fines, Penalties and Forfeitures**, and that FP&F sends interested parties a **Notice of Seizure**.

That notice is much stronger evidence than a seller statement or tracking phrase. It establishes that the property has entered a formal seizure case and gives you a case-specific official route.

For case questions, use the FP&F office identified by the verified notice and the relevant current CBP port record. A seizure number or other case reference should be treated as private case information.

Do not use a phone number, email address, or office copied from somebody else's seizure case as if it were universal.

## Seizure is not the same as final forfeiture

A seizure is a formal enforcement state. It is not, by itself, the final outcome of every case.

Current federal regulations separately address seizure, notice, forfeiture procedure, remission or mitigation, and other administrative or judicial outcomes. That separation matters because:

**seizure ≠ final forfeiture**

and:

**seizure ≠ final disposition**

This page does not predict whether property will be returned, forfeited, destroyed, or otherwise disposed of.

It also does not decide which legal response path is appropriate. Once your question becomes **which legal option should I choose under this notice?**, you have reached the boundary of this guide. Use the exact notice, the official case office, and appropriate qualified advice for the case-specific decision.

## Separate authority, custody, and the case system

A formal customs case can involve several different roles:

- **Regulatory authority:** who controls the admissibility or enforcement decision.
- **Physical custody:** who physically holds, processes, stores, or transports the parcel or property.
- **Case system:** which office owns the formal notice and case record.

These are not automatically the same actor.

CBP says that, for door-to-door deliveries, goods are generally physically controlled by the carrier during the CBP-clearance process. In international mail, the International Sorting Center is a USPS facility, while CBP can control an admissibility decision.

A formal seizure can change the custody picture. Do not infer current physical location merely from the fact that CBP issued or controls an enforcement record.

When contacting an official office, ask about the **case record and controlling process** rather than assuming that office physically has the parcel.

## If the notice is from FDA or another agency, exit this CBP guide

“Detained in customs” does not identify one universal CBP process.

FDA can issue a **Notice of FDA Action** marked **Detained**. FDA treats that as its own Notice of Detention and Hearing and uses its own compliance officer and import process.

If the formal notice was issued by FDA, use the [FDA Detention & Hearing process](https://www.fda.gov/industry/fda-import-process/detention-hearing) and the contact identified on the FDA notice.

Apply the same principle to another federal agency: the verified issuing agency and its formal notice control the official route. Do not force an FDA or other-agency notice into a CBP FP&F workflow.

## Preserve case-specific dates without using a generic internet countdown

This topic has real federal and agency deadlines, but they do not all apply to the same object or legal regime.

The safe rule is:

- keep the notice and envelope where relevant;
- preserve the issue or mailing date;
- preserve the case or seizure reference privately;
- record every deadline printed on the exact governing notice;
- use the official process named by that notice.

Do not replace the notice with a generic deadline copied from a search result, forum post, law-firm article, or another person's case.

A real federal deadline can still be the wrong deadline for your notice.

## Keep the government case separate from seller and payment remedies

A formal CBP notice can be important evidence in a purchase dispute. It does not itself decide the commercial outcome.

**formal CBP notice ≠ automatic merchant refund**

The CBP process does not automatically create, deny, pause, extend, or resolve:

- a seller refund;
- a replacement;
- marketplace buyer protection;
- a payment dispute;
- a chargeback.

Keep those records and deadlines separate. If protecting those commercial routes becomes the primary risk, use [Protect Package Refund, Dispute, and Chargeback Deadlines](/delivery-actions/protect-package-refund-dispute-and-chargeback-deadlines/).

## If the real problem is another customs task, use that owner

A formal notice should not absorb every customs problem around it.

Use the more specific owner when the primary job becomes:

| Primary problem | Better route |
| --- | --- |
| Ordinary customs hold or unresolved review without a formal enforcement object | [Package Stuck in Customs](/package-problems/package-stuck-in-customs/) |
| Failed clearance or customs-related undeliverable disposition without a formal named enforcement object | [Customs Clearance Failed or Package Became Undeliverable](/package-problems/customs-clearance-failed-return-storage-or-disposal/) |
| Verify an ID, tax number, invoice, or proof request | [Customs or Carrier Asks for ID, Tax Number, Invoice, or Proof](/international-shipping/customs-asks-for-id-tax-number-invoice-or-proof/) |
| Correct a known declaration, HS code, value, description, or invoice mismatch | [Customs Declaration, HS Code, Value, or Invoice Mismatch](/international-shipping/customs-declaration-hs-code-value-or-invoice-mismatch/) |
| Broker, formal entry, importer/filer role, POA, or bond dependency | [Customs Broker, Formal Entry, or Power of Attorney](/international-shipping/customs-broker-formal-entry-power-of-attorney/) |
| Verify a first customs fee, duty, tax, brokerage, or release-payment request | [Customs Fee, Duty, Tax, Brokerage, or Release Payment Request](/international-shipping/customs-fee-duty-or-tax-payment-request/) |
| Challenge the amount or decision in an authentic duty/import-tax assessment | [Customs Duty or Import Tax Amount Looks Wrong](/international-shipping/customs-duty-tax-amount-wrong/) |
| Carrier or return workflow explicitly rejects lithium batteries or dangerous goods, without a formal CBP enforcement notice as the primary object | [Package or Return Rejected for a Lithium Battery or Dangerous Goods](/package-problems/lithium-battery-or-dangerous-goods-rejected/) |
| The state is already classified and the remaining question is simply which actor controls the next useful step | [Who Should I Contact About a Package?](/delivery-actions/who-to-contact-about-a-package/) |

## What this evidence does and does not confirm

The reviewed official evidence confirms that:

- ordinary tracking evidence is not the same as a formal CBP detention notice;
- detention and seizure are different states;
- some CBP detentions can retain a release path;
- CBP seizure cases use an FP&F case architecture;
- seizure and final forfeiture are not the same state;
- another federal agency can control a distinct detention process;
- regulatory authority and physical custody can be different;
- government enforcement and commercial remedies are separate systems.

It does **not** establish:

- one universal response option;
- one universal deadline;
- one guaranteed detention cure;
- one guaranteed seizure outcome;
- one universal physical-custody rule;
- a refund entitlement;
- a legal conclusion about a specific notice.

## Keep the notice private

Do not upload or paste private case material into 11Tracking.

Keep private:

- the Notice of Detention or Notice of Seizure;
- seizure or case numbers;
- the full tracking number;
- addresses;
- invoices;
- identification;
- customs documents;
- legal correspondence;
- attorney-client communications.

You can use the notice yourself to identify the issuing agency, notice type, office, case reference, dates, and instructions without sharing those details with this site.

## Scope and product limits

This guide classifies a **verified U.S. CBP formal notice** and routes the user to the correct official system. It does not provide individualized customs or legal strategy.

11Tracking and USTracking cannot authenticate a private legal document, verify a seizure number, contact CBP, FP&F, FDA, a carrier, or an attorney, file a petition or forfeiture claim, clear customs, release property, choose a legal response, or force a seller or payment provider to issue a refund.

Use the verified notice and current official government process as the controlling source for your case.

## Official sources and actions

- [U.S. Customs and Border Protection: Mail - Lost / Missing package](https://www.help.cbp.gov/s/article/Article-1391?language=en_US)
- [U.S. Customs and Border Protection: Internet Purchases - Goods ordered from overseas not received, CBP assistance](https://www.help.cbp.gov/s/article/Article-1174)
- [U.S. Customs and Border Protection: Seized property - Status and returns](https://www.help.cbp.gov/s/article/Article-1112?language=en_US)
- [U.S. Customs and Border Protection: CBP -Warning: ATM, check, money order, internet, and lottery scams.](https://www.help.cbp.gov/s/article/Article-1472?language=en_US)
- [U.S. Customs and Border Protection: Minneapolis-St. Paul, Minnesota - 3501](https://www.cbp.gov/about/contact/ports/minneapolis-st-paul-minnesota-3501)
- [Electronic Code of Federal Regulations: 19 CFR Part 162 - Inspection, Search, and Seizure](https://www.ecfr.gov/current/title-19/chapter-I/part-162)
- [Electronic Code of Federal Regulations: 19 CFR Part 171 - Fines, Penalties, and Forfeitures](https://www.ecfr.gov/current/title-19/chapter-I/part-171)
- [U.S. Government Publishing Office: 19 CFR § 151.16 - Detention of merchandise.](https://www.govinfo.gov/app/details/CFR-2025-title19-vol2/CFR-2025-title19-vol2-sec151-16)
- [U.S. Food and Drug Administration: Detention & Hearing](https://www.fda.gov/industry/fda-import-process/detention-hearing)
- [U.S. Food and Drug Administration: International Mail Facilities](https://www.fda.gov/industry/import-basics/international-mail-facilities)

## Related 11Tracking guides

- [International Package Tracking and Carrier Handoffs](https://11tracking.com/international-shipping/) — Browse international tracking help by handoff stage, customs status, and local carrier.
- [Package Stuck in Customs: What the Status Means and Who Must Act](https://11tracking.com/package-problems/package-stuck-in-customs/) — Identify the likely customs dependency and which party may need to act next.
- [Customs Clearance Failed or Package Became Undeliverable: Return, Storage, or Disposal?](https://11tracking.com/package-problems/customs-clearance-failed-return-storage-or-disposal/) — Classify failed customs clearance by cure, authority, custody, disposition, and actual return movement.
- [Is This Delivery Text, Email, Fee, or Tracking Link a Scam?](https://11tracking.com/package-problems/fake-delivery-message/) — Verify a suspicious delivery text, fee request, or tracking link without using the message.
- [Customs or Carrier Asks for ID, Tax Number, Invoice, or Proof: What to Do Safely](https://11tracking.com/international-shipping/customs-asks-for-id-tax-number-invoice-or-proof/) — Verify who is requesting customs information, why it is needed, who owns it, and how to submit it safely.
- [Why Does My Package Need a Customs Broker, Formal Entry, or Power of Attorney?](https://11tracking.com/international-shipping/customs-broker-formal-entry-power-of-attorney/) — Understand an authenticated customs broker, formal-entry, POA, importer-role, or bond dependency and who may act.
- [Who Should I Contact About a Package?](https://11tracking.com/delivery-actions/who-to-contact-about-a-package/) — Identify whether the seller, shipper, or carrier controls the next package action.

### More related guides

- [Customs Declaration, HS Code, Value, or Invoice Mismatch: Who Can Fix It?](https://11tracking.com/international-shipping/customs-declaration-hs-code-value-or-invoice-mismatch/) — Find which customs field or record conflicts, who owns it, and which actor can correct, amend, or review it.
- [Customs Fee, Duty, Tax, Brokerage, or Release Payment Request: Is It Legitimate and Who Must Pay?](https://11tracking.com/international-shipping/customs-fee-duty-or-tax-payment-request/) — Verify a customs-related parcel payment request, its charge lines, payer allocation, and official payment route.
- [Customs Duty or Import Tax Amount Looks Wrong: Reassessment, Adjustment, or Appeal](https://11tracking.com/international-shipping/customs-duty-tax-amount-wrong/) — Route an authentic disputed customs assessment to the correct review process before or after payment.
- [Protect Package Refund, Dispute, and Chargeback Deadlines](https://11tracking.com/delivery-actions/protect-package-refund-dispute-and-chargeback-deadlines/) — Protect separate package-remedy deadlines without opening incompatible or duplicate disputes.
- [Package or Return Rejected for a Lithium Battery or Dangerous Goods: What to Check](https://11tracking.com/package-problems/lithium-battery-or-dangerous-goods-rejected/) — Classify a lithium or dangerous-goods rejection, verify acceptance, and find the safe responsible route.

[Browse all Package Help guides](https://11tracking.com/package-help/)