Mr. Zhang was recently extremely anxious due to a batch of goods being held up at the port, while Mr. Zhang same batch of goods cleared customs smoothly. The only difference was—a correctly filled Customs Declaration Agency Authorization Letter. This seemingly simple document is actually the "customs clearance password" in cross-border trade. Today, we will unveil its mystery.
What Exactly is a Customs Declaration Agency Authorization Letter?

Simply put, this is a legal document by which the cargo owner authorizes a customs declaration enterprise to handle customs procedures on their behalf. Just as you need an authorization letter to commission a lawyer, customs brokers also require this authorization letter as proof to operate your cargo.
- Legal Basis: According to Article 10 of the Customs Law
- Core Function: Clarify responsibilities and avoid "grey customs clearance"
- Essential Elements: Information of both parties, entrusted matters, validity period, etc.
The Three Major Pitfalls That 90% of People Fall Into
Zhongmaoda Customs Brokerage analyzed cases from the past three years and found:
- Information Mismatch: Failure to update customs registration information after company name change
- Insufficient Authority: Entrusted matters did not include key authorizations such as "cooperation with inspection"
- Expired and Invalid: Using an expired annual authorization letter to handle special goods
Ms. Wang once incurred daily storage fees of 30,000 yuan due to her authorization letter not including the "re-export processing" authority, leading to the detention of re-exported goods.
Electronic Authorization VS. Paper Authorization
According to 2023 customs data, electronic authorization processing is 67% faster than paper:

- Electronic Authorization: Signed online through the "Single Window", real-time verification
- Paper Authorization: Requires original company seal, suitable for special supervisory zones
How to Write an Authorization Letter Professionally
Zhongmaoda recommends adopting the "3+5" principle:
- 3 Must-Haves: Customs code, HS code, cargo value must be filled in
- 5 Points to Note: Validity period not exceeding 1 year, entrusted matters fully checked, signatory must be authorized, modifications must be stamped with company seal, copy of business license attached
A certain cross-border e-commerce company reduced its average customs clearance time from 5 days to 8 hours by standardizing the filling of its authorization letter.
Your Authorization Letter Needs an Upgrade
When the following situations occur, please update your authorization letter immediately:
- Change of the enterprise's legal representative
- Inclusion of special cargo categories such as dangerous goods
- After adjustment of customs credit rating
Now, take a moment to open your authorization letter and check if there are any areas that need improvement. Welcome to share your customs clearance stories in the comment section. The reader with the most likes will receive a set of customs declaration document templates.

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