In container shipping, one of the situations that causes the greatest concern for cargo owners is discovering that the container seal is broken, missing, or does not match the seal number stated on the shipping documents upon arrival.
The first reaction is often:
“The seal has been broken, so the cargo must have been stolen.”
This is an understandable assumption.
However, in marine cargo surveying, a broken seal only indicates that the container’s seal integrity has changed.
It does not, by itself, prove that cargo has been stolen, that the container was unlawfully opened, or that the carrier is liable.
That is why every conclusion must be based on evidence, not merely on the condition of the seal.
One Observation, Multiple Possible Causes
A container of electronic products arrives at the consignee’s warehouse.
Before opening the doors, the receiving staff notice that the seal number on the container does not match the number shown on the Bill of Lading.
The initial observation is straightforward:
The container seal has been changed.
However, this observation alone is not enough to conclude that cargo has been lost.
Several possibilities must be considered:
- The seal was replaced after a Customs inspection.
- The container was opened for quarantine or security screening.
- The original seal was damaged during transportation and officially replaced following established procedures.
- The seal number was incorrectly recorded on the shipping documents.
- The seal was intentionally tampered with to gain unauthorized access to the cargo.
- The seal was accidentally damaged during cargo handling without the container ever being opened.
Each of these scenarios can result in a changed or broken seal.
Yet the cause—and the legal responsibility—may be entirely different.
What the Marine Surveyor Actually Examines
Rather than focusing solely on the damaged seal, a marine surveyor evaluates the entire chain of evidence surrounding the container.
Typical inspection items include:
- The type and condition of the seal.
- The actual seal number compared with the Bill of Lading, booking records, and handover documents.
- Whether there is an official seal replacement record issued by Customs, the terminal, or another competent authority.
- The condition of the container doors, locking bars, hinges, and locking mechanisms.
- Any signs of forced entry or tampering.
- The physical condition and quantity of the cargo.
- Whether the cargo stowage shows evidence of disturbance or rearrangement.
- CCTV footage, gate records, handover reports, or other available logistics documentation.
These findings help determine whether the seal was legitimately replaced as part of an official procedure or unlawfully tampered with, rather than relying solely on the seal’s condition.
A Small Detail Can Completely Change the Conclusion
In one survey case, the consignee discovered that the seal number on the container did not match the number stated on the Bill of Lading.
Initially, the cargo owner alleged that the container had been opened during transit and filed a claim for suspected cargo theft.
However, the investigation revealed that:
- The container had been selected by Customs for a physical inspection at a transshipment port.
- The inspection was fully documented in an official inspection report.
- After the inspection, the container was resealed with a new Customs seal.
- The replacement seal number was properly recorded in the official documentation.
- A complete cargo count confirmed that all cargo was present, and the cargo stowage remained undisturbed.
This chain of evidence demonstrated that the seal replacement was part of a legitimate inspection process, not evidence of cargo theft.
Had the conclusion been based solely on the changed seal, it would have been easy to assume that the container had been unlawfully accessed.
The technical evidence, however, pointed to a completely different conclusion.
The Important Question Is Not Whether the Seal Is Broken
The real question is:
Why was the seal changed, and what actually happened after the original seal was no longer intact?
Two containers may both arrive with broken or mismatched seals.
However:
- One may have been resealed after a Customs inspection.
- One may have received a replacement seal because the original seal was accidentally damaged during handling.
- One may simply involve a documentation error.
- One may indeed have been unlawfully opened and its cargo tampered with.
The condition may appear identical.
But the cause—and the legal liability—can be entirely different.
Conclusion
A broken or mismatched container seal does not, by itself, prove that cargo has been stolen or that the container has been unlawfully accessed.
It merely indicates that the container’s sealing status changed at some point during the logistics chain.
In marine cargo surveying, the surveyor’s responsibility is not simply to confirm that “the seal is broken,” but to determine when the seal changed, why it changed, whether proper procedures were followed, and whether that change actually resulted in cargo loss or damage.
🚛⚓EVERY GATEWAY – ONE SPEED
📍 Ho Chi Minh City ➔ Ba Ria – Vung Tau ➔ Cai Mep ➔ Quy Nhon ➔ Da Nang ➔ Hai Phong….
⚡ 4 HOURS: On-site Attendance ⚡ 12 HOURS: Survey Completion ⚡ 24 HOURS: Certificate Issuance
CONTACT INFORMATION
VIET MARINE CONTROL JOINT STOCK COMPANY – VM CONTROL
📍 Address: 1831/10/9 Huynh Tan Phat Street, Quarter 2, Nha Be Commune, Ho Chi Minh City, Vietnam
📞 Hotline: +84 981 600 440 / +84 918 114 742
🌐 Website: www.vietmarinecontrol.com.vn
📧 Email: survey@vietmarinecontrol.com.vn
🔵 Linkedin: www.linkedin.com/in/vm-control-234252386