Insights · Origin Verification
How to tell if your Taiwan supplier is really making it in Taiwan
Most Taiwanese factories make what they say they make. But the gap between the tariff on Chinese goods and the tariff on Taiwanese goods is now wide enough that some suppliers are tempted to fill an order with parts made somewhere else and ship them as Made in Taiwan.
In August 2026 a White House report on transshipment placed Taiwan in its first tier of countries to watch (summary by Arnold & Porter). Trade lawyers reading the report now advise importers to keep their suppliers' capacity and production records on file. If Customs questions an entry, the importer of record pays the duties and penalties, not the supplier.
I have audited more than 400 factories in Taiwan and Southeast Asia. In my experience the problem is rarely a fake factory. It is usually a real factory that makes some of your order and buys in the rest. The certificate of origin, the invoice and the packing list all look the same either way, because the supplier prepares all three.
Here are the signs I look for, starting with what you can check without leaving your desk.
What you can check from your desk
01The price dropped and nobody can explain why.
A supplier that cuts its price by 15 or 20 percent should be able to tell you where the saving came from: a new machine, a cheaper material source, a process change. If the answer is vague, ask which step of the routing changed. A real process change has a real answer.
02Volume went up faster than the factory could grow.
Ask how many machines make your part and what the cycle time is. Multiply it out: machines x cycle time x shifts x working days. If what they ship you each month is close to or above that number, and they also have other customers, the extra parts are coming from somewhere.
03They resist a short-notice visit.
Any factory will host a visit booked three weeks ahead. Ask for one with 48 hours' notice. A supplier with nothing to hide may grumble about scheduling but will say yes. Repeated delays, or a request that you only see "the main plant", are worth noting.
04The paperwork is perfect but the production records are thin.
Ask for one shipment's lot number, then ask for the production order, material issue record and inspection record for that lot. A factory that made the part can pull these in minutes. A factory that bought it in will send you the certificate of origin again.
What only shows up on the factory floor
05The raw material is not there.
If they machine aluminum stems, there should be aluminum bar in the right alloy and diameter, with mill heat numbers and purchase invoices in volumes that match what they ship. No bar stock, or bar stock in the wrong size, is the single clearest sign.
06The packing area tells a different story from the production line.
Relabeling happens at the end of the process, so that is where I spend the most time. Unbranded cartons of finished parts in receiving, a roll of Made in Taiwan stickers next to a repacking table, or parts moving from plain bags into your branded boxes all mean the same thing.
07One product line has no trail in the ERP.
In a real factory, every product has production orders and material issues in the system. When one product you buy has none, and the planner is coordinating "an outside partner" for it through a messaging app on a personal phone, that product is probably not being made there.
Why I check five things for every product
On a visit I check each product you name against five tests. All five have to hold. If one fails, the product is not verified. There is no partial pass, because a supplier who can explain away one gap can explain away all of them.
The result is often mixed. In our sample report (a fictitious supplier based on patterns I have seen), one product was made on site, one was made at a local subcontractor we also visited, and one was bought in finished and repacked. All three shipped on the same invoice, with the same certificate of origin.
What to do next
If any of the desk checks above raised a question, you have three options, in order of cost:
- Ask the supplier the four desk questions in writing and keep the answers on file.
- Ask us for a free written quick-scan of the supplier. We review public records, company registration, hiring signals and court records, and tell you whether a visit is worth it.
- Send someone. A single on-site origin verification starts at US$500 per day, and you get a verified or not verified verdict for each product, with photos.
Whichever you choose, the point is to have evidence that does not come from the supplier.
Have an order in Taiwan right now?
Tell us the supplier and the products. We will reply within two business days with what a quick-scan or a visit would cover.
Email info@corelinkmfg.comLINE corelink_mfg · Phone +886 963 615 882