From viral TikTok finds to Amazon bestsellers, the rise of the dupe economy has reshaped how consumers shop – and has raised critical questions about how brands can protect themselves. Dupes often succeed not by tricking buyers at checkout, but by mimicking the overall look of well-known goods, particularly when they when carried or worn out in the world or pictured on social media. In this environment, a decision from the UK Supreme Court this summer provides some clarity on how trademark law applies in a market dominated by dupes.
The closely-watched case arose after Dream Pairs, an online footwear retailer, began selling football boots and trainers in the UK bearing a diamond-shaped logo. Umbro’s parent company, Iconix, filed suit, alleging that the logo was confusingly similar to Umbro’s well-known “double diamond” marks. Following proceedings before the lower courts, the Supreme Court ultimately sided with Dream Pairs, agreeing with the district level court that the logos were too different to cause confusion but not before making a clear statement on the importance of post-sale confusion.
Dupes in Action
Perhaps the most significant aspect of the judgment is its endorsement of post-sale confusion as a valid basis for infringement. The Supreme Court confirmed that trademarks do not perform their source-indicating function only at the initial point of purchase. Rather, they continue to signal origin every time a trademark-bearing product is encountered – whether that be on the street or in a social media post.
This principle is critical in today’s market, where the appeal of dupes lies in their optics. In this equation, many consumers are less interested in owning the “original” product than in replicating its overall look convincingly enough. This means that the power of dupes lies not at checkout, where buyers typically know they are not purchasing the “real thing,” but afterward, in selfies, on social media, and in social settings – where onlookers may be duped into assuming the product is authentic. It is precisely this post-sale context that the Supreme Court recognized as legally significant.
The Supreme Court’s recognition that post-sale misperception can undermine a trademark’s source-indicating function equips brands with a powerful enforcement tool. In a marketplace where dupes rarely deceive at the point of sale but derive their value from the impression they create once worn, the Court made clear that brand protection extends beyond checkout.
For fashion and luxury brands, where status and recognition are as important as function, the post-sale encounter is the true battleground – and copycats may not be able to escape liability simply because the initial buyer knew what they were getting.
At the same time, the court’s nod to the legitimacy of post-sale confusion comes amid criticism of the doctrine. Post sale confusion critics have long argued that it often has little to do with the core function of trademarks – identifying the source of goods – and instead, serves to protects a brand’s prestige or status signaling function since the actual buyer is rarely deceived. Some scholars contend that this effectively gives brands too much power to suppress lookalike marks and products and competition in the process, blurring the line between legitimate trademark protection and monopolization. In this sense, the doctrine sits at the intersection of consumer protection and brand control – a tension that courts continue to navigate.
The judgment ultimately favored Dream Pairs, with the Supreme Court accepting that while realistic post-sale contexts can be considered, Umbro’s diamonds and Dream Pairs’ logo were too weakly similar to confuse consumers in practice. This speaks to the balance at play: post-sale confusion matters, but infringement will only be found where the evidence demonstrates a realistic likelihood of mistaken origin.
THE TAKEAWAY: In siding with Dream Pairs, the court has reinforced that trademarks matter well beyond the point of sale, especially in industries like fashion where brand image thrives in public and online contexts. It signals to brand owners that enforcement strategies must account for how products are perceived in real-world settings, not just at checkout.
“Brand owners should be cognizant of [the court’s judgment] when designing new brands, as well as deciding on what products any brand is used on,” Dentons’ Ollie Beels and Jennifer Cass stated in a note. “Decision-makers will need to use their imagination when thinking of how its branding will be encountered in practice and not just side-by-side graphically: You may be liable for infringement if real-world situations give rise to similarity/confusion with third parties even if there is little chance on paper. Likewise, when enforcing their earlier rights brand owners should think about these post-sale contexts when considering the limits of their rights’ effectiveness.”
The case is Iconix Luxembourg Holdings SARL (Respondent) v Dream Pairs Europe Inc and another (Appellants) ([2025] UKSC 25).
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