Trace the material behind the Mexican finished lot
Mexican processing can add production steps without filling an upstream traceability gap. For a US importer, the question is whether the supply chain implicates the UFLPA and whether the records connect the goods to their actual material sources.
Under section 3(a) of the UFLPA, goods mined, produced or manufactured wholly or in part in Xinjiang, or produced by the entities specified in that section, are presumed prohibited and not entitled to US entry, subject to the statutory exception. This can involve goods made wholly or in part from implicated inputs, including through a third country. Chinese sourcing alone does not determine the outcome for every shipment. CBP UFLPA resources
Decide which evidence question is open
| Question | Information to gather | Review to request |
|---|---|---|
| Is an entity potentially within the relevant list? | Legal name, aliases, address, registration details, role and list version | Identity resolution against the current official list |
| Does the shipped material connect to an implicated source? | Actual producers, intermediaries, transport and batch links through production | Supply-chain tracing and an applicability review |
| Has CBP issued a notice? | Full notice, entry and lot references, requested documents and response instructions | Notice-specific work with the importer and qualified counsel or specialist |
| Is an exception to the presumption being sought? | The applicable statutory and CBP requirements and the evidence they require | A distinct exception analysis; evidentiary standards and disclosure requirements matter |
An applicability review addresses whether the goods fall within the presumption. An exception under section 3(b) requires compliance with the prescribed guidance, full responses to CBP inquiries and clear and convincing evidence that the goods were not produced with forced labor. Follow the actual notice and current CBP instructions before choosing a response. UFLPA sections 3(a)–(b) · CBP’s distinction between the two reviews, January 26, 2024
Other forced-labor prohibitions may also require review. CBP forced labor questions
Follow one batch through the plant
For a metal part, start with the finished-lot packing list and the production order. Follow material consumption to receipt lots, invoices and transport documents, then identify the producing mill and upstream materials as relevant to the risk. Where inputs are mixed or split, keep the quantity relationship and the records that explain it.
A Mexican plant may know its distributor but be unable to identify the mill behind one of two coils. Record that missing link. A generic supplier statement cannot replace the absent batch evidence.
| Link in the chain | Useful record and cross-check |
|---|---|
| Finished goods to work order | Shipment lot, dates, quantities and part revision |
| Work order to inputs | Material issues, split/mixed lots, consumption and yield |
| Inputs to plant receipts | Receipt lot, seller/producer identity and transport reference |
| Receipts to upstream production | Purchase and production records connecting the material to its actual source |
| Document chain | Consistent names, quantities, dates and a custodian who can explain differences |
Screen the entity, retain the version
Use the DHS UFLPA Entity List for the current names and notice references. Save when the check occurred and which alias or address caused concern. A similar name needs investigation; a name absent from the list cannot establish that every upstream material is outside the law’s reach.
Put the gap in supplier qualification
Use the supplier qualification exercise to request a redacted sample trail before an award. Assign an owner and deadline for missing records, and reopen the check when the material source changes. Keep confidential production records in the parties’ approved channel. For a detention or other formal action, route the notice and the indexed evidence to the importer’s qualified adviser.
Continue with your records
Official sources and review scope
Source check 2026-11-12. This editorial guide organizes questions and records for a Mexico–US transaction. Confirm the rules, effective dates and facts with the responsible importer and qualified professionals before filing or committing goods.