The two words get used interchangeably and they describe opposite things. One is a legitimate product that happens to resemble another. The other is a misrepresentation about origin.
The distinction is not about how close the resemblance is. It is about whether anyone is being deceived.
General information rather than legal advice.
The definition that actually matters
A counterfeit carries a brand''s name, logo or monogram without authorisation. It is pretending to be a specific product from a specific house. The deception is the defining feature — remove it and the object is something else entirely.
A dupe carries no such branding. It is sold under whoever made it, at whatever it costs, and it resembles something dearer because the shape or colour or idea is similar. No claim is being made about origin.
A useful test: if the branding were removed, would the product still be dishonest? A counterfeit without the logo is just a bag. A dupe never needed the logo to be what it is.
Six ways to tell
1. Branding that should not be there. The clearest signal. A product using another company''s name or logo is the thing to avoid. A product with its own name on it is not.
2. How the seller describes it. Legitimate retailers describe what a thing is — the material, the shape, the colour. A listing that leans on someone else''s brand name to explain what it is, is telling you something.
3. Where it is sold. Established retailers with returns policies, customer service and a registered company behind them operate in a different world from an anonymous listing on a marketplace.
4. Whether the price is explicable. Not against the expensive product — against the materials. A £40 bag in honest synthetic or a simple leather is entirely normal. A £40 bag presented as a £2,000 one is not.
5. Whether returns and rights exist. Legitimate purchases come with consumer rights. If the seller cannot be reached and there is no returns process, that is a signal about the whole operation.
6. Whether you had to be told it was genuine. Nobody needs reassurance that a high-street coat is really from that high-street shop. Reassurance is only necessary where a claim is being made.
Why the difference is worth caring about
Beyond the law, three practical reasons.
Recourse. A legitimate product from a legitimate retailer comes with rights, returns and someone to complain to. A counterfeit comes with none of that.
Safety. Counterfeit goods are outside the testing regimes that legitimate products go through. That matters more in some categories than in clothing, but it is not nothing.
Where the money goes. Counterfeiting at scale is organised, and the supply chains behind it are not pleasant. A cheaper legitimate garment from a real retailer funds a real business.
The bit people find surprising
Resemblance is not, in itself, the problem. Fashion has always worked by iteration — a shape appears, it is interpreted at every price point, and within a season it is everywhere.
That is not a loophole. It is how the industry has always functioned, and it is why a style cannot be owned. What cannot be done is claim someone else made your product.
So a wrap dress that looks like another wrap dress is a wrap dress. A bag with a chain strap is not infringing anyone by having a chain strap. The line is drawn at deception, not at similarity — and once you see it that way, most cases resolve themselves in about ten seconds.
Where DUPI sits
DUPI searches for the look at a friendlier price and only ever returns real products from real UK retailers, described by their attributes rather than by a brand they are not. It does not deal in counterfeits, and it never presents a product as something it is not. The community guidelines state that plainly.
Is buying dupes legal in the UK covers the legal mechanisms in more detail, and when a dupe is worth it is the honest read on when a cheaper version is a good buy and when it is not.