Can a Batch Code Tell You If Your Cosmetics Are Genuine?
A batch code can tell you roughly when a product was made. It cannot prove the product is real. Here is what the code does tell you, and the checks that help more.
- A batch code is a production record. For brands whose format is known, it gives an estimated month of manufacture. It does not prove a product is genuine: a counterfeit can carry a code copied from a real pack.
- A code that decodes to a normal date is not proof that a product is real, and a code our checker can’t read is not proof of a fake — many brands have never published their format.
- What helps more: where you bought it, the label the law requires where it is sold, and the brand’s own customer service.
What a batch code can and can’t tell you
| Question | Can the code answer it? |
|---|---|
| When it was made | Yes, as an estimate — for brands whose format is known from public reports. |
| Which production lot it came from | Yes. That is what the code is for: Korea and Taiwan both require a batch number on the pack. |
| Whether it is genuine | No. A copied code decodes just like a real one. |
| How it was stored, or whether it is still good | No. Go by the printed expiry date and, once opened, the open-jar symbol. |
Check the label required where it is sold
A shop that sells cosmetics has to put certain details on the pack in the local language. They are easy to check, and a missing or odd-looking label is worth a question to the seller.
- Korea — In Korean: product name, the responsible business’s name and address, all ingredients, volume or weight, batch number, the use-by date or period after opening (with the manufacture date), price, and for imports the country of manufacture plus the manufacturer’s name and location (Cosmetics Act, Article 10).
- Taiwan — In Chinese (ingredients may be in English): product name, use, directions and storage, net weight or volume, all ingredients, precautions, the manufacturer’s or importer’s name, address and phone number, the country of origin for imports, the manufacture date with the expiry period or date, and the batch number. Sellers may not alter the label or packaging (Cosmetic Hygiene and Safety Act, Article 7).
- United States — The name and place of business of the manufacturer, packer or distributor, the net quantity, and the ingredients in descending order of predominance (FDA Cosmetics Labeling Guide).
A product you bought yourself from an overseas shop often carries only the label of the country it came from. That alone does not mean it is fake. For a product sold in a shop in Korea or Taiwan, the local label is a legal requirement.
Where you bought it matters most
- The brand’s own store or website, or a retailer the brand names as a stockist, is the most reliable check. Many brands have a store locator on their official site.
- A price far below the usual one, or a seller who can’t say where the stock comes from, is worth a second look.
Ask the brand
Send the code, with a photo of the pack, to the brand’s customer service. The brand is the only source that knows what its own codes mean.
Check when your product was made
Questions
My code decodes to a normal date. Does that mean the product is genuine?
Not necessarily. A copied code decodes too. The date only tells you when a genuine product with that code would have been made.
The checker can’t read my code. Is it fake?
Not necessarily. Many brands have never published their format, formats change over time, and our rules come from public reports. Ask the brand’s customer service.
The code on the box is different from the one on the product. Which counts?
The code on the product itself — that is the one that belongs to the contents.
Sources: Korea, Cosmetics Act Article 10 (easylaw.go.kr) · Taiwan, Cosmetic Hygiene and Safety Act Article 7 · US FDA, Cosmetics Labeling Guide