Quick answer
Build an auditable manufacturer file for U.S. country-of-origin review, CBP Form 28 responses, substantial transformation, EAPA, AD/CVD, UFLPA and anti-transshipment compliance.
Legal conclusion
A certificate of origin, invoice or “Made in Vietnam” label does not by itself prove origin under U.S. law. For ordinary non-preferential origin and marking, CBP asks where the article was manufactured, produced or grown and whether foreign inputs underwent a substantial transformation into a new article with a different name, character or use. This is a totality-of-the-facts test, not a universal local-value percentage.
A defensible file must prove that the factory exists and has capacity, that identified inputs were received and controlled, and that the merchandise entered in the United States passed through the claimed origin-conferring operations. A foreign-issued certificate can support that record but does not bind CBP. Product-specific statutes, textile rules, preference programs and trade-remedy scopes may use different origin tests.
Separate the four origin questions
Review origin separately for: marking under 19 U.S.C. §1304 and 19 CFR Part 134; HTSUS and Chapter 99 measures such as Sections 301 or 232; AD/CVD scope, Commerce circumvention and CBP EAPA; and admissibility under 19 U.S.C. §1307 and UFLPA. One answer does not automatically decide the others. The scope of an AD/CVD order controls over an HTSUS shortcut, while UFLPA may require tracing upstream raw materials even when the finished article has another marking origin.
Substantial transformation analysis
Document every input as imported into the claimed country and the finished article after processing. Relevant facts include changes in name, character and use; complexity, time, skill and machinery; whether components lose their identity in a new article; and where the essential function, core assembly or decisive processing arises. Repacking, relabelling, sorting, simple testing, cleaning or minimal assembly will often be insufficient.
A tariff shift or value-add percentage may matter when a specific statute says so, but it is not a universal substitute for substantial transformation. CBP ruling H320225 illustrates the fact-intensive inquiry into the extent of operations and whether components lose their identity and become integral parts of a new article.
Factory existence and capacity file
Retain corporate registration, investment and operating permits, factory ownership or lease, floor plan, machinery register, equipment invoices, maintenance logs, environmental or sector permits, employee roster, timecards, payroll, shifts, utility consumption and rated versus actual capacity. Date-stamped photographs and video should identify production areas, machines and material flow.
Test claimed export volume against available machines, labour hours, electricity, cycle times, yields and operating dates. A legally registered factory with insufficient physical capacity remains a serious origin risk. Public EAPA files show CBP requesting factory photographs and employee timecards for workers involved in the examined production.
Input and supplier evidence
Maintain a version-controlled BOM for every SKU showing material code, description, quantity, producer, supplier, country of origin, value and manufacturing step. Link it to contracts, POs, invoices, payment records, import declarations, bills of lading, warehouse receipts, inspection reports, certificates of analysis and appropriate producer origin statements.
For Chinese or other high-risk inputs, identify the actual producer rather than only a trader. Validate supplier declarations against facility address, capacity, lot numbers and payment flows. Resolve conflicting countries of origin for the same material code through documented engineering-change and purchasing controls.
Shipment-level manufacturing traceability
For each shipment, connect raw materials to finished goods through production orders, material issues, routers, machine logs, MES/ERP records, shift reports, in-process QC, testing, finished-goods receipts, serial or lot numbers, scrap, yield and rework. Identify the exact operation alleged to create the new name, character or use and where it occurred.
Prepare a quantitative reconciliation: opening inventory plus purchases less closing inventory and reasonable scrap should support material consumed; good units, rejected units and closing finished inventory should reconcile to production. Match model, quantity, weight and dates to commercial invoice, packing list, export declaration, booking, bill of lading, container and seal. A generic process chart without a shipment link is weak evidence.
Accounting, payments and logistics
Support commercial reality with ledgers, cost sheets, accounts payable, bank payments, related-party disclosure, processing fees, assists and royalties. Material cost, labour, depreciation, utilities and output should be commercially coherent. Circular payments, unexplained offsets or common ownership among supplier, processor and customer require transparent explanation.
Logistics records should prove that inputs entered the factory and finished goods left it: delivery orders, weigh tickets, gate logs, vehicle records, stuffing reports, seal logs, photographs and transportation documents. Routing through a third country does not determine origin, but unusual transit, container swaps, production time shorter than the claimed process or exports predating factory operation are enforcement indicators.
Anti-transshipment red flags
High-risk patterns include nearly finished goods receiving only packaging or simple assembly; exports exceeding capacity; missing machinery, workers, utility use or scrap; materials purchased after the production date; broken lot sequences; photographs inconsistent with the SKU; related-party invoices without a clear role; C/O data inconsistent with the BOM; and marketing that identifies a different-country manufacturer.
Chinese inputs do not automatically make the finished good Chinese. The legal question is whether processing in the claimed country meets the applicable transformation test and whether an AD/CVD scope or circumvention determination provides a separate rule. Prepare a SKU-level origin memorandum before accepting orders, not reconstructed paperwork after detention.
Responding to CBP Form 28 and Form 29
CBP Form 28 requests information under 19 CFR §151.11. The U.S. importer of record remains responsible for entry accuracy even when using a broker, while the foreign producer must deliver evidence early enough for the importer to meet the deadline on the request. The current form can seek contracts, POs, technical records, costs, origin, manufacturer information and other legally required documents.
Use a concise legal narrative, exhibit index, supply-chain diagram and BOM–lot–invoice–container matrix. Attach originals with translations and identify confidential submissions. CBP states that a third party may submit sensitive forced-labour evidence, but the importer should be notified and remains responsible. If CBP proposes a change, it may issue Form 29; respond within the notice deadline and preserve protest rights after liquidation.
AD/CVD, circumvention and EAPA
The written scope of an AD/CVD order controls; an HTSUS number is only a reference. Commerce may examine merchandise completed or assembled in a third country from subject-country inputs under 19 CFR §351.226. Screen order scope, case number, producer/exporter, certifications and cash-deposit instructions before shipment.
Under 19 U.S.C. §1517, EAPA addresses covered merchandise entered through a materially false statement, act or omission that reduces or avoids AD/CVD deposits or duties. CBP may impose interim measures, suspend or extend liquidation, require live entry, review bonds, collect deposits and refer the matter for civil or criminal enforcement. Failure to cooperate may support adverse inferences.
UFLPA and forced-labour traceability
19 U.S.C. §1307 prohibits goods mined, produced or manufactured wholly or in part with forced labour. UFLPA creates a rebuttable presumption for goods connected to Xinjiang or an entity on the UFLPA Entity List. Manufacturing the final article in Vietnam or another country does not end the inquiry when upstream cotton, polysilicon, minerals, chemicals, components or other inputs are implicated.
Trace each relevant tier through producer identity and location, PO, invoice, payment, transport, warehouse, batch or lot, mass balance and processing records. Do not conflate substantial transformation with admissibility: an article may have Vietnam origin for marking and still be excluded because a prohibited upstream input was used.
Country-of-origin marking
Under 19 U.S.C. §1304, foreign articles generally must be marked in a conspicuous, legible, indelible and sufficiently permanent manner with the English name of the country of origin for the ultimate purchaser. Part 134 governs exceptions and container marking; §§134.46–134.47 require attention when another U.S. or foreign locality could mislead.
If nonconforming marking is not cured, exported or destroyed under supervision before liquidation, §1304(i) imposes an additional 10% ad valorem marking duty on top of other duties. A post-import “Made in USA” claim is also subject to the FTC's separate standard.
Consequences of an unsupported origin claim
CBP may reject the declared origin, apply another origin and Chapter 99 treatment, deny preference, require remarking, detain goods, demand redelivery or exclude merchandise. AD/CVD exposure can produce cash deposits and final duties far beyond the expected commercial margin, and EAPA can reach relevant unliquidated entries.
Under 19 U.S.C. §1592, a materially false statement or omission caused by negligence, gross negligence or fraud can trigger restored duties and civil penalties. Maximum exposure varies by culpability: fraud up to domestic value; gross negligence up to the lesser of domestic value or four times the lost revenue; negligence up to the lesser of domestic value or twice the lost revenue, with separate formulas for non-revenue violations. Serious conduct may be referred under 18 U.S.C. §§542 or 545. Consider prior disclosure only after privileged legal review of timing, completeness and tender obligations.
Pre-shipment audit checklist
| Review area | Minimum evidence | Reconciliation test |
|---|---|---|
| Product | Specification, photographs, HTSUS, model/SKU | Condition at entry and principal function |
| Factory | Legal entity, premises, machinery, labour, utilities | Actual capacity versus export volume |
| Inputs | BOM, PO, invoice, entry, payment, producer statement | Producer, origin, lot and quantity |
| Production | Work order, material issue, machine/QC log, serial, scrap | Origin-conferring operation and mass balance |
| Finished goods | Receipt, packing list, invoice, container/seal | Model, weight, quantity and dates |
| U.S. law | Origin memo, marking, Chapter 99, AD/CVD, UFLPA | Separate rule for each regime |
| CBP response | Narrative, exhibit index, originals/translations | Complete, indexed and internally consistent |
Run a sample trace before shipment: select a finished serial number and trace it back through the production order, machine and shift, every material lot and producer, payment and outbound container. If the team cannot complete that exercise promptly, the evidence system is not ready for CBP scrutiny.
Recommended action plan
1. Lock the model, HTSUS, configuration, producer and origin of each input. 2. Prepare separate legal analyses for marking, Chapter 99, AD/CVD/EAPA and UFLPA. 3. Run monthly and shipment-level capacity and mass-balance tests. 4. Cure discrepancies before issuing a certificate or applying origin marking. 5. Put audit rights, response deadlines, confidentiality and duty/penalty allocation in supplier contracts. 6. Seek a prospective CBP origin/marking ruling under 19 CFR Part 177 when the process is material or uncertain. 7. Retain entry and supporting records under 19 U.S.C. §1508 and 19 CFR Part 163, generally for five years, subject to any longer specific requirement.
Official U.S. sources
Sources checked through September 12, 2026: 19 U.S.C. §1304, 19 CFR Part 134, 19 U.S.C. §1592, 19 U.S.C. §1517, CBP Form 28, CBP ruling H320225, Commerce circumvention guidance, CBP Forced Labor FAQ, CBP binding-ruling requirements and 19 CFR Part 163.
Limits of this guidance
This is a general evidence and compliance framework, not a CBP ruling, Commerce scope ruling or legal opinion for a particular shipment. A final origin conclusion requires the model, HTSUS, BOM, origin and producer of each input, every manufacturing operation, machinery, time, cost, capacity, production order and shipment records. Helpful content and verifiable sources can support search discovery, but cannot guarantee indexing, ranking or quotation.
Global HS Code Checker Editorial Board
Official sources to verify
- WCO — HS Nomenclature 2022 and General Rules for Interpretation
- United States International Trade Commission — Harmonized Tariff Schedule
Editorial note
Prepared by the Global HS Code Checker Editorial Team for customs-classification, tariff and import-policy research. The correct code and applicable measures may change with the merchandise's actual characteristics, jurisdiction, entry date and supporting record. Verify the current tariff, governing measures and competent customs authority before filing an entry. A reviewer is identified only after a named expert has completed the review.