Cargo thieves stole an estimated $304.6 million in freight in the second quarter of 2026 alone, more than double the same quarter last year, according to Verisk CargoNet. By late May, CargoNet had already reported 28 stolen shipments worth more than $1 million each. And some crews don’t smash anything. They cut the seal on a parked trailer, take only the most valuable pallets and clamp on a lookalike. The trailer looks untouched. Nobody recognizes the theft until final delivery.
Holiday weeks give these crews the conditions they want: fewer staff, closed facilities, and unattended freight. If your team treats an intact seal as proof of an intact load, your freight is at risk. This guide shows how the seal swap works and what your team must do now to catch cargo seal tampering.
How a Seal Swap Works in Logistics Theft
This type of theft is known as pilferage by industry analysts and involves stealing part of the load instead of the whole trailer. This type of theft is often not noticed until the final delivery, frequently in a different place than where the theft happened.
The Trailer Sits Unattended
Warehouses, distribution centers and truck stops rank among the top hot spots for cargo theft. Thieves look for trailers parked overnight in drop yards or at rest stops. Holiday weekends add pressure. CargoNet recorded a five-year high of 66 theft events over Memorial Day in 2025.
A Lookalike Seal Goes On
The thief cuts the original seal, takes selected pallets and installs a replacement that matches in color and style. One security manager at Crowley Liner Services has said thieves counterfeit sequential seal numbers to steal loads.
The Loss Surfaces Later
The driver rolls on unaware. The receiver finds the shortage at the dock, sometimes states away from the theft. By then the trail is cold, and nobody can say where the load was compromised.
Four Checks That Catch a Fake Seal
U.S. Customs and Border Protection (CBP) teaches a four-step seal check called VVTT. Carriers can apply the same routine to domestic trailers.
| Step | What to do | What it catches |
|---|---|---|
| View | Inspect the seal and both door locking mechanisms | Damage, wrong style or color |
| Verify | Match the seal number to the paperwork | Counterfeit or swapped seals |
| Tug | Pull firmly on the seal | Loose or poorly applied seals |
| Twist | Twist and turn the seal | Seals that unscrew or come apart |
An intact seal with the wrong number is a compromised seal. Treat it that way. Customs-Trade Partnership Against Terrorism (C-TPAT) members must also use seals that meet the ISO 17712 high-security standard, and domestic fleets can borrow that benchmark.
Supply Chain Security Roles: Who Checks What
Drivers and Dispatchers: Check After Every Stop
Run all four checks every time you return to the trailer, whether after a fuel stop or an overnight stop at a truck stop. Photograph the seal and call dispatch before you move if anything looks off.
Shippers and Warehouses: Log and Photograph Every Seal
Record the seal number, type and application time on the bill of lading. Take a photo of the seal on the doors before the trailer leaves. Lock up unused seals and limit who can issue them.
Receivers: Verify Before You Cut
Compare the seal number to the paperwork before anyone cuts it. C-TPAT guidance calls for the same VVTT check on inbound shipments before cutting the seal. Photograph the seal as found, then cut it.
What to Do When a Seal Doesn’t Match
- Stop. Don’t unload or move the trailer.
- Document. Photograph the doors, the locks, and the seal.
- Preserve. Keep the fake seal in a bag as evidence.
- Report. Notify the shipper and the carrier, and report the confirmed theft to CargoNet.
Law Enforcement-Led Supply Chain Security
Procedures only work when people follow them under duress. Blue Star Security staffs every assignment with state-certified active-duty and retired law enforcement officers, including professionals with extensive experience in major investigations. We assess your dwell points, seal handling and yard access, then build coverage around your routes and schedules.
Protecting freight in transit? Talk to our team about supply chain security.
Need security built around your logistics operation? Learn more about our logistics solutions.
Cargo Seal Tampering: FAQs
What is cargo seal tampering in logistics?
Seal tampering refers to when a seal has been removed or replaced without authorization. Usually performed by thieves they will try to steal a section of the load but won’t leave any clear signs that they have done so.
How can you identify a fake seal?
Ensure the number matches your documentation. Look at the color, design and lock of the seal. Give it a pull and twist to see how well it fits. If the numbers do not match you should consider the load to be compromised.
Does GPS tracking prevent seal tampering?
No, on its own it cannot. If the trailer is on-route then thieves can still open the doors at an unauthorized stop. GPS should be used in combination with seal checks and documented stops.
Can Blue Star help secure trailers and cargo?
Yes. We offer a range of supply chain security services, investigations and security assessments which can help you identify vulnerabilities such as unattended dwell times and poor seal management. Our security solutions can be scaled to fit your operations.
