Top Reasons Shipments Get Delayed by U.S. Customs (2025 Importer Guide)

Avoiding Red Flags at U.S. Customs: Common Mistakes Importers Make

Importing goods into the United States can be a lucrative venture, but it comes with its own set of challenges. U.S. Customs and Border Protection (CBP) is vigilant in enforcing regulations to ensure the safety and compliance of imported goods. Even minor oversights can lead to significant delays, fines, or seizure of goods. This guide highlights common mistakes that importers make and provides practical steps to avoid them, ensuring a smoother customs clearance process.

Red Flags That Trigger U.S. Customs Holds

CBP uses risk-based targeting systems to screen shipments before they reach port. Even if your shipment appears routine, certain patterns or omissions can flag your goods for inspection. Here are some of the most common triggers:

🚫 Incomplete or Mismatched Documents: Discrepancies between your commercial invoice, bill of lading (BOL), and packing list can raise immediate concerns—especially mismatched product descriptions or quantities.
📦 Suspiciously Low Declared Values: Declaring a $100 value on 10 high-end electronics is a common red flag for under-invoicing. CBP compares values against known benchmarks.
🔍 Vague Product Descriptions: Terms like “goods,” “samples,” or “merchandise” are insufficient. CBP requires clear, specific product names and use descriptions.
🧾 Improper HTS Classification: Using the wrong HTS code (intentionally or not) can trigger audits, especially if it affects duty rates or bypasses regulatory reviews.
📉 Repeat Violations Linked to EIN or Importer ID: If your importer account is associated with past infractions or seizures, CBP scrutiny increases automatically.

Even experienced importers can get flagged—especially if their paperwork isn’t airtight. Understanding these triggers is the first step in avoiding costly delays.

Mistakes That Could Get Your Shipment Seized

Unlike routine holds, seizures are far more serious. They often result in loss of the shipment and possible penalties. Here are key reasons CBP may seize cargo:

⚠️ Importing Counterfeit Goods: Products bearing unauthorized trademarks or falsely claiming brand names are subject to immediate seizure under intellectual property law.
🌍 Falsifying Country of Origin: Labeling goods “Made in USA” when they’re not, or masking origin to avoid duties, is a violation that CBP aggressively enforces.
📄 Lack of Required Certifications: Goods like medical devices, cosmetics, electronics, and children’s products often require FDA, FCC, or CPSIA documentation. Missing these triggers seizure or re-export.
🛃 Restricted or Prohibited Items: Attempting to import embargoed goods or materials on restricted lists (e.g., certain chemicals, animal products) without a license can lead to permanent forfeiture.

CBP treats these violations seriously. They don’t just delay your shipment—they can affect your importer reputation long-term.

Top U.S. Customs Entry Filing Errors

Even if your cargo and documents are legitimate, errors in the entry filing process can still delay clearance. Avoid these common mistakes:

🕒 Late or Missing ISF Filing: The Importer Security Filing (ISF or “10+2”) must be submitted at least 24 hours before vessel loading. Late submissions can trigger automatic penalties of up to $5,000.
📑 Mismatched BOL and Invoice Data: The consignee name, commodity description, and package count must match across documents. Discrepancies are a common cause of holds.
👤 Incorrect Importer of Record or Broker Info: CBP requires exact matching IDs (EIN, CBP importer number). Errors here delay entry and can cause CBP to reject filings entirely.
📉 Using the Wrong Entry Type: Filing as a low-value shipment (e.g., de minimis) when duties should apply can raise red flags—especially for repeat importers or higher-value goods.

Working with a licensed customs broker is highly recommended to avoid filing errors that may not be obvious but could derail clearance.

How to Stay Off the Radar at U.S. Customs

While no importer is completely immune to inspection, there are proven strategies to reduce your risk and streamline the clearance process:

👨‍💼 Use a Licensed Customs Broker: Brokers understand filing requirements and can help classify products, submit ISF/7501 correctly, and catch red flags before they reach CBP.
🧾 Be Consistent and Complete in Paperwork: Avoid last-minute changes. Inconsistent descriptions or HTS codes across shipments will trigger system alerts.
🚫 Don’t Reuse Problem Suppliers: Once a supplier has been flagged for incorrect labels or faked documents, future shipments are far more likely to be examined—even from new importers.
📊 Maintain a Clean Compliance History: CBP uses historical data. Filing clean entries consistently helps you build a “low-risk” importer profile.

Staying organized and proactive doesn’t just prevent problems—it speeds up clearance and builds long-term supply chain efficiency.

What to Do If Your Shipment Is Held or Seized

Even compliant shipments can be flagged for review. Here’s how to handle the situation calmly and correctly:

⏳ Understand the Process: If your goods are “held for examination,” CBP or a Partner Government Agency (PGA) will inspect or test the goods. This can take a few days to several weeks.
📨 Respond to CBP Notices Promptly: You may receive a Notice of Detention (within 5 days of hold) or a Seizure Notice (if violations are confirmed). Respond quickly and with supporting documents.
📋 Document Everything: Keep emails, filing records, and original docs on hand. You may need to prove classification, valuation, or origin again.
👨‍⚖️ Request Legal Review (If Needed): For formal seizures, you can file a petition or seek relief through CBP’s administrative process or legal counsel. Visit CBP Legal Proceedings for details.

Don’t panic—but don’t delay either. Proactive communication and clean records make it easier to resolve issues quickly.

Conclusion: Import Smart, Avoid Delays

U.S. Customs enforcement has tightened in recent years—and small oversights can lead to major delays or financial losses. By understanding what triggers holds, how to avoid common filing errors, and how to stay compliant, importers can reduce risk and improve turnaround times.

Every shipment is an opportunity to build trust with regulators. Use clean documents, verify your suppliers, and work with knowledgeable partners. When in doubt, slow down and double-check—because customs doesn’t offer second chances.

📚 Helpful Resources

❓ Common Questions About Customs Holds

Here are some frequent concerns importers have about U.S. Customs procedures:

🛃 Why was my shipment flagged if my documents were correct?

CBP also checks supplier history, valuation patterns, and risk profiles. Even clean paperwork can be flagged for random exams or pattern matching.

📆 How long can U.S. Customs hold a shipment?

CBP must issue a Notice of Detention within 5 business days of the hold. Holds can last from 3 days to several weeks depending on the issue and type of inspection.

🧾 What’s the difference between a hold and a seizure?

A hold is temporary and usually cleared with verification. A seizure means CBP believes a violation has occurred—such as smuggling, IP violation, or regulatory failure—and requires legal response.

👨‍💼 Can I resolve a customs issue without a broker?

You can, but brokers are trained to resolve issues quickly, navigate CBP systems, and file petitions or documentation if a seizure occurs. They’re especially useful for regulated goods.

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