The legal categories are clear enough. A counterfeit good is a fake, an unauthorized reproduction trading on someone else's trademark. A gray-market good is a real, manufacturer-made product that arrived in US commerce through an unauthorized channel. The first is illegal. The second is not. Tell that to the brand whose authorized pricing is being undercut by its own product, sold by a stranger, with no warranty, no support, and no quality control. The listing is real, the product is real, and the damage is real, which is why gray market enforcement is the hardest problem in brand protection: the tools built for counterfeits do not fit it.
Gray market goods are usually genuine branded products originally intended for sale in a different country. A brand might sell a version of a product in Europe with different ingredients, different packaging, instructions in another language, or no domestic warranty coverage. When those products are imported and resold in the US, the material differences between the gray market version and the authorized domestic version can support a trademark infringement claim. Courts focus on whether the imported goods are materially different from the domestic versions, and variations in formulation, packaging language, included accessories, warranty availability, or regulatory compliance can all qualify.
The single most important rule for any reseller is the first sale doctrine: once a trademark owner sells a product, the trademark right is generally exhausted as to that particular item, and the buyer can resell it without the brand's permission. The Supreme Court set out the logic in Champion Spark Plug Co. v. Sanders in 1947, allowing a business to sell used Champion spark plugs it had repaired, still carrying the Champion name, as long as they were clearly sold as repaired or reconditioned. A seller who buys genuine products at retail, from a liquidator, or from a distributor that broke its contract, and resells them unaltered, is usually within the first sale doctrine. Being unauthorized is not, by itself, trademark infringement, and selling below a MAP price is not either: a MAP policy is a policy for the partners you work with, and it does not establish infringement or a right to remove a reseller.
Courts have recognized two exceptions, and both require proof. The first is material difference: in the Eleventh Circuit's phrasing from Davidoff v. PLD International, a material difference is anything consumers would consider relevant to a decision about whether to purchase, and even subtle differences count. The Otter Products case is the textbook example: Triplenet sold genuine OtterBox products on Amazon without authorization and without the warranty, and the court held that the missing warranty was a material difference that stripped the first sale defense. The second exception is quality control: if the reseller's distribution does not meet quality controls the brand really follows, and the brand can prove it audits those controls, the defense fails there too.
Marketplace takedowns are issued on the brand owner's word that a listing is infringing. Amazon's Brand Registry, Project Zero, and similar programs do not require the brand to prove counterfeit versus gray-market at the takedown stage. The listing goes down first, the seller appeals second, and the appeal turns entirely on what documentation the seller can produce. That asymmetry cuts both ways: a brand that files gray-market claims as counterfeit claims is filing the wrong right for the violation, and a seller with invoices, a clean listing, and proof of genuine stock wins the appeal.
The practical advice follows from the doctrine. For brands, the claim is material difference or quality control, documented with the specific difference: warranty, packaging, formulation, instructions, or regulatory compliance. For resellers, the defense is documentation: invoices showing a lawful first purchase, unaltered product, honest listing language that does not claim authorized status or a warranty the product does not carry. The question is never did we authorize this seller. It is whether what this seller offers is really the same product the brand sells, presented honestly.
If this topic is useful, these earlier guides go deeper on connected questions: Unauthorized Reseller Tracking: Finding the Leak Before the Price War, MAP Violation Monitoring: The Evidence That Makes a Policy Real, and Transparency Codes: Serialization Is the Only Gate Counterfeits Cannot Climb.
Counterfeit goods are fakes. Gray market goods are genuine manufacturer-made products sold through unauthorized channels. The first is illegal; the second usually is not.
Usually, yes. Once a trademark owner sells a genuine product, the buyer can generally resell it without permission, unless a material difference or quality-control exception applies.
Anything consumers would consider relevant to a purchase decision: different formulation, packaging language, missing warranty, different accessories, or non-compliance with US regulations.
Through Brand Registry takedowns, yes, but the listing goes down first and the seller appeals second. The brand must prove a real IP violation, not just unauthorized status.