The Importance of Shipping Container and Seal Numbers in Exporting

What Is a Container Number? See example below.

What is a shipping container number?

A container number is a unique identifier assigned to a shipping container. It’s usually made up of four letters (the owner/operator code), followed by seven numbers (e.g., TEMU7086188).

This number is printed on the outside of the container and is used to:

• Track the container globally

• Match the container with shipping documentation

• Verify that the correct container is being loaded/unloaded

Think of it as the license plate of your container — it’s how you identify your cargo throughout its journey.

What Is a Seal Number?

What is the container seal number?

Once a container is packed and ready for shipping, it’s locked with a security seal — usually a metal or plastic bolt seal — and each seal has its own seal number. This number should match the one listed on the Bill of Lading and shipping documents.

Why it’s important:

• Tamper evidence: A broken or mismatched seal number may indicate that the container was opened or tampered with.

• Customs compliance: Many authorities will inspect the seal and log the number for verification.

• Claims support: In the event of damage, theft, or loss, seal records are critical evidence for insurance claims.

Why You Should Log These Numbers Every Time

Recording the container and seal numbers for each shipment is a simple but vital practice in logistics management. Here’s why:

✅ Traceability: Helps match cargo to paperwork and verify its identity

✅ Security: Confirms that the shipment wasn’t interfered with during transit

✅ Compliance: Meets customs and international shipping regulations

✅ Risk Management: Provides key evidence in case of disputes, damage, or loss

Make Logging Part of Your Standard Operating Procedure

Create a shipment log for every consignment. Include:

• Container Number

• Seal Number

• Date packed/sealed

• Person responsible

• Photo of the seal on the locked container

This simple log can save you from costly issues down the line.

Conclusion

It may seem like a minor detail, but the container and seal numbers are your shipment’s identity and protection. Logging them is a small habit that brings major peace of mind.

Need help tracking and managing your shipments? Contact us on info@msboxesandpackaging.co.uk to learn more about how we streamline logistics from dispatch to delivery.