Dupe, fake or replica: what each word means, and which are legal
A dupe is a different product sold under its own brand. A fake carries someone else's. In the US the first is legal, and selling the second is a federal crime.
| The word | What it is | Whose name is on it | Legal to sell in the US? |
|---|---|---|---|
| Dupe | A cheaper product that does the same job or gives the same look as a well-known one. | Its own brand's | Yes |
| Clone, or “inspired by” perfume | A fragrance made to smell like a named perfume. | Its own brand's | Yes, and the ad may name the original if it is truthful and doesn't confuse buyers about who made it |
| Knockoff | A copy of how a product looks, without its logo. | Its own, or none | Usually, unless the look itself is protected and buyers would be confused about the maker |
| Fake, counterfeit, “replica” | A product carrying a brand's name or logo without its permission. “Replica” is the seller's word for the same thing. | Someone else's | No. Selling one is a federal crime |
Are dupes legal?
Yes. The case that settled it is about perfume: in 1968 a company advertised its $7 “Second Chance” as a duplicate of the $25 Chanel No. 5, Chanel sued, and the Ninth Circuit held that someone who has copied an unpatented product sold under a trademark may use that trademark in advertising to identify what was copied, so long as the ad doesn't misrepresent the product or confuse buyers about who made it (Smith v. Chanel, 402 F.2d 562). Chanel itself conceded the right to copy the formula.
The line is the name. US trademark law defines a counterfeit as “a spurious mark which is identical with, or substantially indistinguishable from, a registered mark” (15 U.S.C. § 1127), and knowingly trafficking in goods that carry one is punishable, for an individual, by up to 10 years in prison and a $2,000,000 fine on a first offense (18 U.S.C. § 2320). A $10 lipstick in a shade close to Pillow Talk is a dupe. The same lipstick with “Charlotte Tilbury” printed on it is a counterfeit.
Why a fake is a health risk and a dupe isn't that risk
A dupe is made and labeled by a company that answers for it: US rules require a cosmetic's label to give the name and place of business of its manufacturer, packer or distributor (21 CFR 701.12), and the ingredient list on the pack is the one you can read and compare. A fake copies the label and nothing behind it.
- The FBI reported that counterfeit cosmetics “often contain things such as arsenic, beryllium, and cadmium (all known carcinogens) along with high levels of aluminum and dangerous levels of bacteria”, and that counterfeit fragrances have been found to contain DEHP, which the EPA classes as a probable human carcinogen (FBI, 2 January 2014).
- US Customs seized 528,036 perfumes and 500,716 personal care items for trademark and copyright violations in fiscal year 2024, out of 32.4 million goods worth $5.42 billion at their retail price. About 90% of the goods came from China and Hong Kong (CBP, IPR Seizure Statistics FY 2024).
On Amazon: check who sells it
Amazon says it identified, seized and disposed of more than 15 million counterfeit products worldwide in 2025 (Amazon, Trustworthy Shopping Experience Report). The check a shopper can make is on the product page, under the Buy button: the line that says who ships and who sells. Amazon.com or the brand's own store is a seller that answers for the product. For anyone else, open the seller's page before you buy.
That line is this site's first rule. All 232 pairs here link only to listings sold by Amazon.com or the brand, 46 luxury originals are shown with no link because only resellers carry them, and 89 brands have a page that names the seller of every listing. Who sells each brand on Amazon · How a dupe gets on this site
Questions
Are dupes illegal?
No. In the US a company may copy an unpatented formula and sell it under its own name, and may even name the original in its advertising as long as the claim is true and buyers aren't misled about who made it (Smith v. Chanel, Ninth Circuit, 1968). What is illegal is putting another brand's name or logo on the product: that is a counterfeit.
Is a dupe the same as a fake?
No. A dupe is a different product with its own brand on it, such as an e.l.f. primer sold as an e.l.f. primer. A fake carries the name of the brand it copies, and US law defines it by that mark: a spurious mark identical with, or substantially indistinguishable from, a registered one.
What is a dupe perfume?
A perfume from another brand made to smell like a well-known one, also called a clone or an “inspired by” fragrance. It is sold under its own name, which is what makes it a dupe and not a fake. A clone copies the accord, not the raw materials, so the opening tends to land close and the drydown thins out sooner.