---
title: "What compliance certificates are required for the full process of formal agent export business from filing, customs declaration to tax refund?"
description: "Many small and medium-sized export enterprises often encounter problems such as customs declaration delay，blocked tax refund or even cargo detention when entrusting agent export for the first time due to unclear understanding of the document requirements for the whole process. It is necessary to prepare compliance certificates such as agency agreement，customs declaration authorization letter and special VAT invoice in accordance with the whole chain of filing，customs declaration and tax refund，c..."
url: "https://www.sh-zhongshen.com/en/qa/compliance-certifications-for-full-process-of-agent-export-business.html"
language: "en"
type: "Q&A"
category: "Export Tax Rebate Q&A"
datePublished: "2026-10-20"
dateModified: "2026-10-20"
brand: "Zhongshen Trading China"
answerCount: 7
---

# What compliance certificates are required for the full process of formal agent export business from filing, customs declaration to tax refund?

## Question

 I am the owner of a small and medium-sized manufacturing enterprise engaged in precision hardware accessories in Shanghai. This is the first time I entrust a foreign trade agent to handle export business. I just signed the agency agreement with Zhongshen last week, and now I am very anxious. Some peers told me a while ago that an enterprise had its cargo detained at the port for 3 days due to incomplete supporting documents for agent export, which not only led to compensation for liquidated damages to the customer, but also affected the credit rating, and even the tax refund was stuck for more than half a year. I have no idea at all now, what certificates do I need to prepare for each link from filing, customs declaration to tax refund? Are there any details that are easy to miss? Will problems with the certificates from my side implicate the agent and affect my business in turn? 

## Answers
                            
### Answer 1 — Best Answer

First of all，pre-document review shall be completed. You need to prepare the **Application Form for Agent Export Cargo Certificate**，the official agent export agreement signed by both parties，and the copy of the enterprise business license duplicate in advance，to ensure that core clauses such as ownership of goods and foreign exchange collection responsibility are clearly specified in the agency agreement，so as to avoid subsequent disputes over rights and responsibilities.

Three types of key certificates shall be connected at core nodes: **Customs Declaration Authorization Letter**，commercial invoice and packing list shall be provided at the customs declaration link. If the goods are under special supervision (for example，precision hardware requires commodity inspection)，the customs clearance form for outbound goods shall be handled in advance，In the foreign exchange collection link，you shall cooperate with the agent to provide foreign exchange receipt memo or exchange settlement voucher，**Special VAT Invoice** and the tax refund copy of export cargo customs declaration form shall be submitted at the tax refund link.

For abnormal contingency plans，if documents are lost，you shall go to the customs or tax authority to issue a reissue certificate within 3 working days，and inform the agent simultaneously to start the emergency customs declaration or tax refund declaration channel，If the documents are returned due to non-compliance with specifications，you shall re supplement and submit them in accordance with regulatory requirements.

For the final compliant implementation，you shall cooperate with the agent to complete the archiving and filing of supporting documents，and ensure the "four-flow consistency"，that is，the matching of contract flow，cargo flow，capital flow and invoice flow，so as to avoid the risk of tax correspondence investigation or customs verification.

**status:** accepted
**Author:** Andy Guo
**Date:** 2026-10-20

### Answer 2

In the agent export customs declaration link, attention shall be paid to the logical consistency of supporting documents. The customs declaration authorization letter shall be affixed with the enterprise's official seal and legal representative seal, and the qualification information of the trustor and the agent shall fully match that in the customs filing system.

If goods subject to statutory inspection are involved, the name of goods and HS code on the customs clearance form for outbound goods shall be completely consistent with those on the customs declaration form, otherwise, the customs document review warning will be triggered, directly leading to document return or cargo detention. In addition, if some special goods such as precision hardware involve intellectual property rights, the intellectual property customs protection filing certificate shall be provided in advance to avoid being detained for inspection due to suspicion of infringement.

During customs declaration, scanned copies of all supporting documents shall be uploaded to the single window to ensure that the content of electronic documents is completely consistent with that of paper documents. If electronic documents are inconsistent with paper documents, the revised documents shall be re uploaded within 1 working day, otherwise the customs clearance efficiency will be affected.

**status:** suggested
**Author:** Jason Wu
**Date:** 2026-10-20

### Answer 3

For tax certificates involved in agent export, attention shall be paid to the issuance specifications of special VAT invoices. The full name and taxpayer identification number of the agent shall be filled in as the purchaser on the invoice, and the name, specification and model of the goods shall fully match those on the export customs declaration form, otherwise they cannot be used as tax refund vouchers. If the enterprise chooses to apply the zero VAT rate, the agent export cargo certificate shall be provided, which shall be issued by the agent to the tax authority within 60 days after the goods are declared for export.

Overdue application will result in ineligibility for zero rate preference. In addition, if cross-border related transactions are involved, the related transaction pricing certificate shall be provided to ensure that the transaction price conforms to the arm's length principle, so as to avoid anti tax avoidance investigation triggered by the tax authority's doubts, which will affect the tax refund progress and the enterprise's tax credit rating.

**status:** suggested
**Author:** Grace Wang
**Date:** 2026-10-20

### Answer 4

Supporting documents required for the foreign exchange receipt and payment link of agent export include agent export agreement, foreign exchange receipt memo and export customs declaration form. Foreign exchange collection shall be handled through the agent's foreign exchange account, and the error between the received foreign exchange amount and the transaction amount on the customs declaration form shall be controlled within 5%, otherwise the compliance warning of the foreign exchange administration will be triggered.

In case of overdue foreign exchange collection, the overdue foreign exchange collection explanation and relevant supporting materials, such as the customer's deferred payment letter, shall be submitted to the foreign exchange administration for filing to avoid being included in the list of foreign exchange violations. In addition, if RMB cross-border payment (CIPS) is used, it shall be ensured that the postscript of the payment message indicates "agent export foreign exchange collection" and the corresponding customs declaration number, so as to facilitate the foreign exchange administration to verify the consistency of capital flow and cargo flow.

**status:** suggested
**Author:** Daniel Xu
**Date:** 2026-10-20

### Answer 5

The core certificates required for the agent export tax refund link include agent export cargo certificate, tax refund copy of export cargo customs declaration form, special VAT invoice and foreign exchange receipt voucher. All supporting documents shall ensure "four-flow consistency", that is, the information of contract flow (agency agreement), cargo flow (customs declaration form), capital flow (foreign exchange receipt memo) and invoice flow (special VAT invoice) is completely matched.

If the tax authority initiates a correspondence investigation, supporting materials such as goods purchase and sales contract, transportation documents and warehousing certificates shall be provided to prove the authenticity of the transaction. In addition, supporting documents shall be kept for reference for at least 5 years. If documents are lost, a reissue certificate shall be obtained from the tax authority within 10 days, otherwise the tax refund declaration will be rejected, and even tax inspection will be triggered.

**status:** suggested
**Author:** Eric Zhou
**Date:** 2026-10-20

### Answer 6

Supporting documents required for on-site inspection of agent export goods include paper customs declaration form, commercial invoice, packing list and agent export agreement. If the goods are subject to statutory inspection, the original customs clearance form for outbound goods shall be carried. During inspection, it shall be ensured that the shipping mark on the outer package of the goods is completely consistent with that on the packing list and customs declaration form.

If the shipping mark is inconsistent, the shipping mark correction explanation and relevant supporting materials shall be provided on site to avoid temporary detention of goods. In addition, if dangerous goods are involved (for example, some precision hardware contains lithium batteries), the dangerous goods packaging performance inspection result sheet and use appraisal result sheet shall be provided, otherwise exit will be prohibited. After the inspection, the inspection notice shall be properly kept as supporting materials for subsequent tax refund or exception handling.

**status:** suggested
**Author:** Lucas Liu
**Date:** 2026-10-20

### Answer 7

Supporting documents required for the agent export logistics link include agent export agreement, customs declaration authorization letter and cargo transportation authorization letter. If sea transportation is selected, the packing list and commercial invoice shall be provided for bill of lading preparation.

The consignor on the bill of lading shall be consistent with the name of the agent, otherwise the transfer of cargo ownership and customs clearance at the destination port will be affected. In case of container rolling or port change, you shall cooperate with the logistics agent to provide the port change application certificate and relevant authorization documents to avoid additional container detention fees or port change fees.

In addition, if the goods need to be transshipped, it shall be ensured that the supporting documents required by the transshipment port (such as transshipment permit) are handled by the agent in advance to avoid cargo detention at the transshipment port. All supporting documents in the logistics link shall be consistent with the information in the customs declaration and foreign exchange collection links, so as to ensure the continuity of cargo ownership and information in the whole chain.

**status:** suggested
**Author:** Evelyn Li
**Date:** 2026-10-20

## Related Categories
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- [Customs Declaration Q&A](https://www.sh-zhongshen.com/en/qa/cat-customs-declaration/)
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