Two offers can use the same serum name and still send you different formulas. They can also charge in euros while dispatching from different countries. Before deciding which is cheaper, establish which transaction you are comparing.
When buying Korean skincare in Europe, I would separate three questions: who sells it, which product version they supply, and what the delivered order will cost. The detail behind each question matters more than how European the homepage looks.
Start with the business behind the listing
On a retailer's website, find its legal business name, contact details and return terms. On a marketplace, identify the seller of that particular listing. The platform logo is not necessarily the business supplying your bottle.
Your Europe explains why trader status matters: EU consumer protections differ between professional traders and private sellers. EU rules should also cover a non-EU online trader specifically targeting EU consumers, although enforcing rights against an overseas business can be harder.
Next, establish the dispatch and return locations. A shop serving German customers in German may dispatch from Korea; a local warehouse may have a different returns address. Neither arrangement automatically makes the shop good or bad. It changes delivery expectations and the practical cost of resolving a problem.
A real example: Numbuzin No.3
Numbuzin is a Korean skincare brand organised around numbered ranges. Its No.3 Skin Softening Serum illustrates why a number and a familiar bottle photograph are not enough to identify a formula.
Checked on 4 October 2026, the official Korean 30 ml ingredient list includes bakuchiol and kojic acid. Those names are not listed on the official US No.3 serum page, which describes the 50 ml product. There are other differences too, explored in our No.3 formula guide.
This establishes a difference between the published lists. It doesn't tell us the change date, the formula of every bottle in circulation or which version every European seller stocks. It certainly isn't proof that one is counterfeit.
If you're trying to avoid a particular ingredient, ask the seller for the ingredient panel on its actual stock. “Is it the No.3 serum?” leaves the relevant question unanswered. “Does the supplied pack list bakuchiol, and can you show its ingredient panel?” is much more useful.
Use the same precision for sets and refills. A 200 ml bottle-plus-refill offer and a single 200 ml bottle are different purchases, even when the main photograph looks nearly identical.
For an order dispatched from Korea, the Olive Young Global EU shipping guide shows why delivery, VAT and other import charges need to be included in the comparison.
Read traceability information for what it is
Ireland's regulator, HPRA, explains the cosmetic label information, including a Responsible Person address, batch reference, ingredient list, quantity and durability information. Its English or Irish-and-English language guidance is specific to Ireland; language requirements should be checked for the actual market.
The Responsible Person has a compliance role and must be based in the EEA or Northern Ireland. This entity may be different from your retailer. HPRA also states that it does not issue a general authorisation or certification to place a cosmetic on the market.
An address and batch code help trace a product. They don't guarantee that the contents are authentic or that the formula suits your skin. A generic “EU approved” badge is not a substitute for that information.
Authenticity is a separate question
If the brand publishes authorised sellers, compare the specific seller name with that information. An absent name is a reason to ask the brand, not sufficient evidence to accuse the seller of selling fakes.
For a concern about an item already received, supply clear product and batch photos. Packaging colours can look different in photographs, and regional labels or redesigns can legitimately differ. A translated sticker alone therefore cannot decide authenticity; equally, convincing packaging cannot prove the contents.
That is where a brand response can be more valuable than a social-media font comparison. Ask a precise question about the seller and product, and keep any uncertainty visible.
Compare offers using the same six lines
| Detail | What to establish |
|---|---|
| Seller | Legal business and trader status |
| Dispatch | Country the selected item ships from |
| Product | Full name, size, formula/version and selected set |
| Delivered cost | Product, delivery and stated tax or import-charge arrangements |
| Return route | Destination, procedure and terms for the actual seller |
| Authenticity information | Brand-listed seller or a specific brand response, where available |
Leave a field unknown until you have an answer. Our Olive Young returns guide gives one retailer-specific example; its policy should not be applied to every shop.
I would pay more for a clearer transaction when the cheaper offer leaves the formula or return route unresolved. An overseas order can also be a sensible choice once those details are established. The aim is to compare the actual bottles and terms, rather than two matching photographs and two different prices.