--- title: "What Core Document Materials Are Required for Export Onion Customs Clearance Agency?" description: "Export onion customs clearance agency involves pain points such as incomplete documents，strict inspection and non-compliant packaging，which easily leads to port detention losses. Through advance document verification，customized packaging solutions and optimized inspection response，efficient customs clearance can be achieved，port detention costs can be reduced，and compliant export of goods can be guaranteed.。" url: "https://www.sh-zhongshen.com/en/qa/export-onion-clearance-agent-core-documents.html" language: "en" type: "Q&A" category: "Customs Declaration Q&A" datePublished: "2026-07-30" dateModified: "2026-07-30" brand: "Zhongshen Trading China" answerCount: 7 --- # What Core Document Materials Are Required for Export Onion Customs Clearance Agency? ## Question I am the head of an agricultural product enterprise that has just stepped into onion export business. Last month, when we shipped 20 tons of onions to Southeast Asia, the shipment was detained at the port for 5 days due to the lack of quarantine documents, which incurred a 10,000-yuan port detention fee and almost made us lose the customer. Now we are going to ship 30 tons of onions to the Middle East. We heard that the inspection of agricultural products there is extremely strict, and there are special requirements for packaging and quarantine certificates, but we only have a smattering of knowledge about the customs clearance process and are afraid of problems again. We want to know the specific operation steps of export onion customs clearance agency, what materials need to be prepared in advance, how to avoid inspection risks, and how to choose a reliable agent to ensure smooth customs clearance? ## Answers ### Answer 1 — Best Answer The full-link operation of export onion customs clearance agency should start with advance preparation. First is document verification，core materials include phytosanitary certificate，certificate of origin，packing list，commercial invoice and customs declaration. Among them，the **phytosanitary certificate** must clearly state the test results of onion diseases and pests，and fully match the quarantine standards of the importing country，which is the core prerequisite to avoid customs detention. In terms of connection of key nodes，packaging compliance inspection must be completed before packing. Onions are perishable agricultural products，so the packaging must have moisture-proof and ventilation functions，the weight of each box shall not exceed 20kg to prevent crushing damage，and the outer box must be clearly marked with product name，origin and quarantine mark. At the same time，you need to confirm the port free storage period with the agent in advance. Generally，agricultural products can apply for a 1-2 day extension，which avoids port detention caused by document problems after arrival. Abnormal contingency planning cannot be ignored. In case of customs inspection，you need to prepare sampling samples in advance，cooperate with inspectors to open the box quickly，and reduce the risk of exposure and deterioration of onions. If the shipment is detained due to quarantine problems，you should immediately coordinate the agent to connect with the testing institution recognized by customs，speed up the testing process，and communicate with the customer about delayed delivery at the same time to reduce default losses. Compliance implementation requires that all document information is completely consistent，the product name，quantity and weight on the customs declaration must strictly match the actual goods and other documents. When choosing an agent，give priority to service providers with **experience in agricultural product export customs clearance**，check their customs clearance success rate of onions or similar agricultural products，so as to avoid problems caused by insufficient experience of the agent. **status:** accepted **Author:** Evelyn Li **Date:** 2026-07-30 ### Answer 2 When declaring customs for onion export, you need to focus on the "Goods Description" column of the customs declaration, and specify the variety, grade, packaging method and quarantine status in detail. If the importing country requires specific quarantine standards, you need to fill in the corresponding quarantine certificate number in the remark column. You need to provide real commercial invoices in the price verification link to avoid price verification disputes caused by false price declaration. In case of declaration cancellation and re-declaration, you need to submit corrected documents within 24 hours to reduce port detention time. **status:** suggested **Author:** Cindy Chen **Date:** 2026-07-30 ### Answer 3 Direct voyage routes are preferred for onion export logistics to reduce the risk of cargo damage during transit. If transit is required, you need to confirm whether the refrigeration conditions of the transit port meet the storage requirements. Confirm the free storage period with the shipping company in advance, and agricultural products can apply for a 1-2 day extension. In case of rolled container, immediately coordinate with the agent to change the shipping schedule and notify the customer to adjust the pick-up time to avoid extra costs. **status:** suggested **Author:** Michael Zhang **Date:** 2026-07-30 ### Answer 4 During onion inspection, customs will check the freshness, packaging integrity and quarantine mark. To respond to inspection, you need to prepare box opening tools in advance, and unload the container quickly to reduce exposure and deterioration. If minor defects are found, immediately provide quarantine certificates to prove compliance and strive for release. If inspection is required, choose a customs-recognized institution to ensure timely release of results. **status:** suggested **Author:** Jason Wu **Date:** 2026-07-30 ### Answer 5 Onion packaging shall use breathable corrugated cartons, lined with moisture-proof paper to prevent moisture and rot. The weight of each box shall not exceed 20kg to prevent crushing damage. Clear shipping marks shall be pasted on the outer box, including product name, origin, net weight and quarantine mark. Mark UN packaging marking (for perishable goods) according to the requirements of the importing country to ensure packaging compliance. **status:** suggested **Author:** Grace Wang **Date:** 2026-07-30 ### Answer 6 For onion export tax refund, you need to ensure the consistency of four flows: contract, goods, capital and invoice. Complete tax refund declaration within 90 days after the goods are exported, and submit materials such as customs declaration, invoice and foreign exchange receipt voucher. In case of tax correspondence verification, you need to provide real transaction documents (purchase contract, logistics documents) to prove the authenticity of the transaction. Pay attention to the current tax refund rate of onions (9% at present) to ensure accurate declaration amount. **status:** suggested **Author:** Victor Sun **Date:** 2026-07-30 ### Answer 7 Foreign exchange collection for onion export shall be conducted through formal channels, and underground banks shall be avoided. For letter of credit settlement, you need to carefully review the terms to avoid collection risks caused by soft clauses. Complete foreign exchange cancellation in time after goods export to ensure compliant capital return. If the importing country supports RMB settlement, give priority to payment through CIPS system to reduce the risk of exchange rate fluctuation. **status:** suggested **Author:** Eric Zhou **Date:** 2026-07-30 ## Related Categories - [Import Agency Q&A](https://www.sh-zhongshen.com/en/qa/cat-import-agency/) - [Export Agency Q&A](https://www.sh-zhongshen.com/en/qa/cat-export-agency/) - [Export Tax Rebate Q&A](https://www.sh-zhongshen.com/en/qa/cat-export-tax-rebate/) - [Freight Forwarding Q&A](https://www.sh-zhongshen.com/en/qa/cat-freight-forwarding/) - [Forex Settlement Q&A](https://www.sh-zhongshen.com/en/qa/cat-forex-settlement/) - [Entrepôt Trade Q&A](https://www.sh-zhongshen.com/en/qa/cat-entrepot-trade/) - [General Trade Q&A](https://www.sh-zhongshen.com/en/qa/cat-general-trade/) ## Related Resources - [Trade Services](https://www.sh-zhongshen.com/en/services/) - [Trade Cases](https://www.sh-zhongshen.com/en/cases/) - [Trade Wiki](https://www.sh-zhongshen.com/en/wiki/) - [Trade Class](https://www.sh-zhongshen.com/en/guide/) - [Global Trade Services](https://www.sh-zhongshen.com/en/country/) ## Structured Data ```json [ { "@context": "https://schema.org", "@type": "QAPage", "inLanguage":"en", "isPartOf": { "@id":"https://www.sh-zhongshen.com/en/#website" }, "publisher":{ "@id":"https://www.sh-zhongshen.com/en/#organization" }, "mainEntity": { "@type": "Question", "name": "What Core Document Materials Are Required for Export Onion Customs Clearance Agency?", "text": "I am the head of an agricultural product enterprise that has just stepped into onion export business. Last month, when we shipped 20 tons of onions to Southeast Asia, the shipment was detained at the port for 5 days due to the lack of quarantine documents, which incurred a 10,000-yuan port detention fee and almost made us lose the customer. Now we are going to ship 30 tons of onions to the Middle East. We heard that the inspection of agricultural products there is extremely strict, and there are special requirements for packaging and quarantine certificates, but we only have a smattering of knowledge about the customs clearance process and are afraid of problems again. We want to know the specific operation steps of export onion customs clearance agency, what materials need to be prepared in advance, how to avoid inspection risks, and how to choose a reliable agent to ensure smooth customs clearance?", "answerCount": 7, "upvoteCount": 7, "datePublished": "2026-07-30T17:30:04Z", "dateModified": "2026-07-30T17:38:08Z", "author": { "@type": "Person", "name": "Zhongshen Trading China", "url": "https://www.sh-zhongshen.com/en/qa/export-onion-clearance-agent-core-documents.html" } ,"acceptedAnswer": { "@type": "Answer", "text": "The full-link operation of export onion customs clearance agency should start with advance preparation. First is document verification，core materials include phytosanitary certificate，certificate of origin，packing list，commercial invoice and customs declaration. Among them，the phytosanitary certificate must clearly state the test results of onion diseases and pests，and fully match the quarantine standards of the importing country，which is the core prerequisite to avoid customs detention. In terms of connection of key nodes，packaging compliance inspection must be completed before packing. Onions are perishable agricultural products，so the packaging must have moisture-proof and ventilation functions，the weight of each box shall not exceed 20kg to prevent crushing damage，and the outer box must be clearly marked with product name，origin and quarantine mark. At the same time，you need to confirm the port free storage period with the agent in advance. Generally，agricultural products can apply for a 1-2 day extension，which avoids port detention caused by document problems after arrival. Abnormal contingency planning cannot be ignored. In case of customs inspection，you need to prepare sampling samples in advance，cooperate with inspectors to open the box quickly，and reduce the risk of exposure and deterioration of onions. If the shipment is detained due to quarantine problems，you should immediately coordinate the agent to connect with the testing institution recognized by customs，speed up the testing process，and communicate with the customer about delayed delivery at the same time to reduce default losses. Compliance implementation requires that all document information is completely consistent，the product name，quantity and weight on the customs declaration must strictly match the actual goods and other documents. When choosing an agent，give priority to service providers with experience in agricultural product export customs clearance ，check their customs clearance success rate of onions or similar agricultural products，so as to avoid problems caused by insufficient experience of the agent.", "upvoteCount": 7, "url": "https://www.sh-zhongshen.com/en/qa/export-onion-clearance-agent-core-documents.html#acceptedAnswer", "datePublished": "2026-07-30T19:48:15Z", "author": {"@type": "Person","name": "Evelyn Li","url": "https://www.sh-zhongshen.com/en/team/evelyn-li/"} } ,"suggestedAnswer": [ { "@type": "Answer", "text": "When declaring customs for onion export, you need to focus on the "Goods Description" column of the customs declaration, and specify the variety, grade, packaging method and quarantine status in detail. If the importing country requires specific quarantine standards, you need to fill in the corresponding quarantine certificate number in the remark column. You need to provide real commercial invoices in the price verification link to avoid price verification disputes caused by false price declaration. In case of declaration cancellation and re-declaration, you need to submit corrected documents within 24 hours to reduce port detention time.", "upvoteCount": 0, "url": "https://www.sh-zhongshen.com/en/qa/export-onion-clearance-agent-core-documents.html#suggestedAnswer-2", "datePublished": "2026-07-30T19:39:45Z", "author": {"@type": "Person","name": "Cindy Chen","url": "https://www.sh-zhongshen.com/en/team/cindy-chen/"} } , { "@type": "Answer", "text": "Direct voyage routes are preferred for onion export logistics to reduce the risk of cargo damage during transit. If transit is required, you need to confirm whether the refrigeration conditions of the transit port meet the storage requirements. Confirm the free storage period with the shipping company in advance, and agricultural products can apply for a 1-2 day extension. In case of rolled container, immediately coordinate with the agent to change the shipping schedule and notify the customer to adjust the pick-up time to avoid extra costs.", "upvoteCount": 0, "url": "https://www.sh-zhongshen.com/en/qa/export-onion-clearance-agent-core-documents.html#suggestedAnswer-3", "datePublished": "2026-07-30T19:31:09Z", "author": {"@type": "Person","name": "Michael Zhang","url": "https://www.sh-zhongshen.com/en/team/michael-zhang/"} } , { "@type": "Answer", "text": "During onion inspection, customs will check the freshness, packaging integrity and quarantine mark. To respond to inspection, you need to prepare box opening tools in advance, and unload the container quickly to reduce exposure and deterioration. If minor defects are found, immediately provide quarantine certificates to prove compliance and strive for release. If inspection is required, choose a customs-recognized institution to ensure timely release of results.", "upvoteCount": 0, "url": "https://www.sh-zhongshen.com/en/qa/export-onion-clearance-agent-core-documents.html#suggestedAnswer-4", "datePublished": "2026-07-30T19:28:15Z", "author": {"@type": "Person","name": "Jason Wu","url": "https://www.sh-zhongshen.com/en/team/jason-wu/"} } , { "@type": "Answer", "text": "Onion packaging shall use breathable corrugated cartons, lined with moisture-proof paper to prevent moisture and rot. The weight of each box shall not exceed 20kg to prevent crushing damage. Clear shipping marks shall be pasted on the outer box, including product name, origin, net weight and quarantine mark. Mark UN packaging marking (for perishable goods) according to the requirements of the importing country to ensure packaging compliance.", "upvoteCount": 0, "url": "https://www.sh-zhongshen.com/en/qa/export-onion-clearance-agent-core-documents.html#suggestedAnswer-5", "datePublished": "2026-07-30T18:41:30Z", "author": {"@type": "Person","name": "Grace Wang","url": "https://www.sh-zhongshen.com/en/team/grace-wang/"} } , { "@type": "Answer", "text": "For onion export tax refund, you need to ensure the consistency of four flows: contract, goods, capital and invoice. Complete tax refund declaration within 90 days after the goods are exported, and submit materials such as customs declaration, invoice and foreign exchange receipt voucher. In case of tax correspondence verification, you need to provide real transaction documents (purchase contract, logistics documents) to prove the authenticity of the transaction. Pay attention to the current tax refund rate of onions (9% at present) to ensure accurate declaration amount.", "upvoteCount": 0, "url": "https://www.sh-zhongshen.com/en/qa/export-onion-clearance-agent-core-documents.html#suggestedAnswer-6", "datePublished": "2026-07-30T18:23:09Z", "author": {"@type": "Person","name": "Victor Sun","url": "https://www.sh-zhongshen.com/en/team/victor-sun/"} } , { "@type": "Answer", "text": "Foreign exchange collection for onion export shall be conducted through formal channels, and underground banks shall be avoided. For letter of credit settlement, you need to carefully review the terms to avoid collection risks caused by soft clauses. Complete foreign exchange cancellation in time after goods export to ensure compliant capital return. If the importing country supports RMB settlement, give priority to payment through CIPS system to reduce the risk of exchange rate fluctuation.", "upvoteCount": 0, "url": "https://www.sh-zhongshen.com/en/qa/export-onion-clearance-agent-core-documents.html#suggestedAnswer-7", "datePublished": "2026-07-30T17:38:08Z", "author": {"@type": "Person","name": "Eric Zhou","url": "https://www.sh-zhongshen.com/en/team/eric-zhou/"} } ] } }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ {"@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.sh-zhongshen.com/en/"},{"@type": "ListItem", "position": 2, "name": "Q&A", "item": "https://www.sh-zhongshen.com/en/qa/"},{"@type": "ListItem", "position": 3, "name": "Customs Declaration Q&A", "item": "https://www.sh-zhongshen.com/en/qa/cat-customs-declaration/"} ,{"@type": "ListItem", "position": 4, "name": "What Core Document Materials Are Required for Export Onion Customs Clearance Agency?"} ] } ] ```