A seal is a tamper-evident device used on containers. It helps secure the goods after packing and dispatch. This article outlines considerations for using seals in cargo transportation.
Why seals matter in logistics
Seals help preserve the shipment's condition after packing and provide evidence of unauthorized opening. They are important to cargo owners and customs alike.
For cargo owners
A seal helps protect the load against pilferage or substitution and supports confidence in shipment integrity.
For customs
The source describes sealing as a required control in the import and export arrangements discussed, helping prevent substitution or additions after clearance.
Points to consider when using seals
For containershipments, pay attention to the following:
Use an appropriate seal standard
Because seals support cargo control for both the owner and customs, choosing suitable quality is essential.
Quality considerations
The article identifies the following characteristics:
- Resistance to substitution
- A seal number that cannot readily be altered
- A one-way locking mechanism
- A robust seal body
The body and locking mechanism should be strong and secure. The source discusses metal cable constructions that require dedicated cutters to remove and cannot be restored to their original condition after cutting, helping reveal interference.
Choose an established manufacturer and suitable verification. Poor-quality seals may be opened or restored more easily. The source recommends checking for:
- US CTPAT-related compliance documentation, described in the source as certification
- Manufacture to ISO 17712
- An H marking on high-security bolt seals, which the source associates with customs approval
Read more: Nguyen Logistics ocean freight services
Choose for the shipment's requirements
In addition to quality, consider:
- The goods being carried
- Destination country, port, and customs requirements
- The transport mode
- The shipping line's requirements
The source cites Clause 2, Section I of Official Letter No. 4314/GSQL from 1997 and lists the following historical color rules:
- Ordinary import and export trading goods: orange.
- Joint-venture and investment goods: green.
- Imported production materials and processing goods: yellow.
- Noncommercial goods, transit cargo, temporary imports for reexport, merchanting shipments, empty containers, and similar categories: white.
Seal numbering
Each seal needs a distinct identifier to support control. The source highlights:
- A separate seal number for each container.
- Unique numbers without duplication.
- Use of the exact number supplied when using a shipping line seal.
- Serial numbers may use a sequence or date-related format. For example, “23 00001” combines 2023 with a sequential number. A company may also use a prefix to identify its name or a relevant cargo category.
Read more: Nguyen Logistics customs declaration services
Seal charges
A seal fee covers the seal used to secure the container before dispatch. The source states that a separately arranged seal may avoid this fee, subject to the carrier's acceptance.
It quotes approximately VND15,000 per seal purchased directly from customs and around VND150,000 per seal from a shipping line. These are source prices requiring confirmation for a current shipment.
Choose a seal that meets the applicable quality and shipment requirements. Suitable sealing supports confidence throughout transportation. We hope this overview clarifies the purpose, selection, and use of container seals.