Shipping internationally requires proper documentation to ensure smooth customs clearance and avoid costly delays. Even small mistakes in paperwork can mean fines, shipment hold-ups or even confiscation of goods. Knowing the common mistakes and how to fix them is key for businesses who want to streamline their logistics.
If you’re shipping from the UK, working with UK customs clearance agents, such as 121 Air Sea Cargo Ltd, can help you avoid these pitfalls and comply with customs regulations.

1. Incorrect or Missing Customs Forms
One of the most common shipping documentation mistakes is filling out customs forms incorrectly or leaving out vital information. Missing information like tariff codes, country of origin or goods description can lead to delays or rejection by customs authorities.
How to Fix It:
- Always check forms twice before submitting.
- Use the correct HS codes for your goods to avoid misclassification.
- Work with UK customs clearance agents who can review and validate your documents before shipping.
2. Misdeclared Value of Goods
Under declaring or over declaring the value of goods can cause big problems including fines or shipment seizures. Some shippers try to lower declared values to reduce taxes and duties but customs authorities can fine you for incorrect declarations.
How to Fix It:
- Declare the value of goods as per invoice and commercial agreements.
- Keep a record of transactions to justify the declared value if customs ask.
- Seek expert advice from customs clearance professionals to get it right.
- Follow international labelling standards and include required information on all packages.
- Ensure proper packaging for fragile or hazardous materials to comply with regulations.
- Talk to 121 Air Sea Cargo for advice on correct packaging and labelling.
5. Not Keeping Copies of Documents
Many businesses don’t keep copies of important shipping documents which can be a problem if customs ask for verification.

How to Fix It:
- Always keep digital and physical copies of shipping documents including bills of lading, commercial invoices and export declarations.
- Use cloud storage for easy access to documents when needed.
How Customs Clearance Agents in the UK Can Help
Working with a reliable customs clearance agent ensures your shipping documents are accurate and compliant with regulations. 121 Air Sea Cargo Ltd offers expert services to handle customs paperwork, minimize delays, and prevent costly errors.
Avoid shipping mistakes today! Contact 121 Air Sea Cargo Ltd for smooth and hassle-free customs clearance.