Tiffany v. eBay:
How to Answer Your Assignment Questions
You’ve read the case. Now you need to explain the Inwood test, apply it to eBay’s specific actions, and take a defensible position on the platform duty question. This guide walks you through both questions — what to argue, how to structure it, and what the strongest answers actually look like.
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Tiffany conducted a study and found that approximately 75.5% of items listed as “Tiffany” products on eBay were counterfeit. They sued eBay for direct trademark infringement, contributory trademark infringement, and trademark dilution. Both the district court (2008) and the Second Circuit Court of Appeals (2010) ruled in eBay’s favor on the major claims. The case is now a landmark on how the Inwood contributory trademark standard applies to online marketplaces.
The basic facts set up a genuine tension. Tiffany had hard evidence — their own purchasing study — that counterfeit goods were flooding eBay under their brand name. eBay knew this too. So how did eBay walk away without liability? The answer is in what “knowledge” means under the law, and it’s exactly what your assignment is asking you to unpack.
What Was Not in Dispute
Both courts agreed that actual counterfeiting by third-party sellers on eBay was happening. The dispute was entirely about whether eBay — as the platform — bore legal responsibility for those third-party actions. That distinction is the core of your whole assignment.
The Inwood Test: What It Says and Why It Matters Here
Before you can answer either assignment question, you need the Inwood framework locked down. The test comes from Inwood Laboratories, Inc. v. Ives Laboratories, Inc., 456 U.S. 844 (1982) — a Supreme Court case about generic drug manufacturers. In that context, the Court said a manufacturer or distributor is contributorily liable for trademark infringement if they:
Prong 1: Intentional Inducement
The defendant intentionally induces another party to infringe a trademark. Think active encouragement or facilitation — not just passive hosting. Tiffany didn’t argue this prong applied to eBay, and the courts didn’t spend much time on it.
Prong 2: Knowledge + Continued Supply
The defendant continues to supply its product or service to someone it knows or has reason to know is engaging in trademark infringement. This was Tiffany’s main argument — and the prong the courts dissected in detail.
The threshold question in this case was whether Inwood even applied to a service provider like eBay at all — since Inwood was originally written for manufacturers and distributors of physical products. The district court said yes, following a line of circuit court cases that extended Inwood to service providers who exercise sufficient control over the means of infringement. eBay controlled listings, collected fees, promoted sellers, and could terminate accounts — that level of control was enough to bring it within the Inwood framework.
Why This Extension Matters for Your Answer
Many students jump straight to the “knowledge” issue without acknowledging that the court first had to extend Inwood to cover online service providers at all. Showing you understand that threshold step — and why the court took it — signals genuine engagement with the case’s reasoning, not just its outcome.
There’s also an important concept the court brought in: willful blindness. Under established trademark doctrine, a defendant who deliberately avoids acquiring specific knowledge of infringement — essentially closing their eyes to obvious red flags — can still be held liable as if they had actual knowledge. The court examined whether eBay had been willfully blind. It found it hadn’t — and that finding is crucial to your Question 1 answer.
Why eBay Wasn’t Liable: Applying the Inwood Elements
Your question asks you to explain why eBay wasn’t held liable by walking through how the Inwood test applied to what eBay actually did. Here’s how to structure that analysis — not by copying the answer, but by showing you how the pieces connect so you can write it in your own words.
Establish That Inwood Applies to eBay at All
Start here. Inwood was written for manufacturers of physical goods. eBay is a service platform. The court had to decide whether Inwood extends to services. It did — but only where the service provider exercises sufficient control over the means of infringement. Your answer should note eBay’s control: it facilitated listings, earned commissions, could remove sellers, and actively promoted products. That control was enough to bring eBay within Inwood’s scope. This isn’t just a formality — without this step, the entire analysis collapses.
Address Prong 1: Did eBay Intentionally Induce Infringement?
Tiffany didn’t press this prong hard, and the courts disposed of it quickly. There was no evidence eBay told sellers to list counterfeit goods or took steps to encourage counterfeiting. eBay’s advertising of Tiffany products — using the Tiffany name in listings — was found to be legitimate nominative fair use, because eBay was accurately describing genuine goods also sold on the platform. Running a sentence or two on this in your answer shows you’ve addressed both prongs, not just the one that got all the attention.
Address Prong 2: The “Knowledge” Question — This Is the Core
Here’s where the case turns. Tiffany argued eBay had generalized knowledge that counterfeits existed on the platform — and that this should be enough to trigger liability. The courts rejected this. The Inwood standard requires specific knowledge of particular infringing acts, not general awareness that some unspecified sellers might be infringing. Think of it this way: knowing that “some” counterfeit goods exist in a marketplace of millions of listings is categorically different from knowing that this specific seller, in this specific listing, is selling a fake right now. The law requires the latter.
What eBay Did When It Did Have Specific Knowledge
When Tiffany — or anyone else — notified eBay of a specific counterfeit listing, eBay removed it promptly. That’s the key factual finding. The Inwood standard asks whether a defendant continued to supply services to someone it knew was infringing. eBay stopped servicing those sellers as soon as it had specific, actionable knowledge. It didn’t drag its feet. It also invested heavily in anti-counterfeiting infrastructure — the Verified Rights Owner (VeRO) program — spending more to police counterfeits than Tiffany itself spent policing its own mark on the platform. That’s a strong factual basis for the court’s conclusion.
Address Willful Blindness — and Why the Court Rejected It
Willful blindness is the doctrine that lets courts impute knowledge to a defendant who deliberately avoids finding out what they clearly should know. Tiffany argued eBay was burying its head in the sand — that its general knowledge of rampant counterfeiting meant it should have done more proactive policing. The court said no. eBay had invested significantly in anti-counterfeiting tools. A finding of willful blindness under these facts would have effectively converted the Inwood standard from “specific knowledge” to “general knowledge” — something the court explicitly didn’t want to do, because it would chill legitimate secondary markets and resale of genuine goods.
Generalized knowledge that some portion of goods sold on a platform may be counterfeit is not the same as knowing that a specific seller is infringing. Conflating the two would impose liability that stifles legitimate commerce in genuine goods.
— Paraphrasing the core holding of the Second Circuit in Tiffany v. eBayCommon Mistake in Q1 Answers
Many students write as though the court said eBay had no knowledge at all. That’s wrong. The courts found eBay had generalized knowledge. The point is that generalized knowledge isn’t enough under Inwood. Make that distinction explicit in your answer — it’s where the legal reasoning actually lives.
The Platform Duty Question: Who Do You Owe More?
Question 2 is more open-ended and more interesting. It’s asking you to think like a decision-maker, not just a case analyst. You need to stake out a position on two things: (1) as an online service provider, to whom do you owe the greater duty — your customers who knowingly want cheaper imitation goods, or the trademark holders whose IP is being violated? And (2) would you go beyond what the law requires to reduce infringing sales?
There’s no single “right” answer the professor is looking for. But there are weak answers and strong answers. A weak answer just describes both sides and shrugs. A strong answer takes a clear position, defends it with reasoning grounded in both the case and the broader legal/ethical context, and acknowledges the strongest counterargument.
The Arguments on Each Side
Argument for Greater Duty to Customers
Your users chose your platform knowing what they were getting
- Adult consumers who knowingly buy imitation products without confusion aren’t being deceived — trademark law exists to protect consumers from deception, not to prevent informed choices in secondary markets
- Imposing proactive policing duties on platforms effectively makes the platform an unpaid enforcement arm of private companies — a role that distorts the economics and purpose of marketplace services
- Over-policing creates its own harm: the court explicitly worried that expanding liability would chill legitimate resale of genuine Tiffany goods — real products bought by real sellers who have every right to resell them
- If the law doesn’t require more, building that additional policing cost into your platform means you’re subsidizing a private company’s brand protection efforts with your users’ money
- The court placed the primary enforcement burden on Tiffany itself — the party with the most knowledge of its own mark and the best ability to distinguish authentic from counterfeit goods
Argument for Greater Duty to Trademark Holders
Scale, profit, and structural position create responsibilities beyond minimum legal compliance
- eBay profits from every transaction, including counterfeit ones — there’s an argument that profiting from infringement-enabling infrastructure creates a moral (if not legal) obligation that exceeds the Inwood floor
- Platforms have data advantages that trademark holders don’t: they can detect patterns — the same seller listing hundreds of “Tiffany” items at implausibly low prices — that individual rights-holders cannot identify at scale
- Not all buyers “knowingly” buy imitations — some customers genuinely believe they’re getting a deal on authentic goods, meaning the “no consumer confusion” assumption doesn’t hold for every transaction
- Reputational spillovers: counterfeit goods that fail or harm users damage the authentic brand’s reputation even when the consumer knew they were buying an imitation — injury beyond trademark confusion
- Minimum legal compliance is a floor, not a ceiling — companies frequently take actions beyond what law requires when it aligns with long-term reputational and trust interests
How to Structure Your Position
The strongest answers to Q2 do three things: (1) acknowledge that the law as it currently stands resolves the legal duty question — Inwood puts the burden on the trademark holder, not the platform; (2) argue whether, as a matter of ethics or business practice, you would go beyond that legal floor and why; and (3) specify what “going beyond” would actually look like in concrete terms — not just “do more” but what more.
What “Going Beyond the Law” Could Actually Look Like
If your position is that you would take precautions beyond what law requires, be specific. Vague statements about “doing more” don’t score well. Here are concrete measures a platform could implement that would exceed the Inwood minimum:
- Proactive algorithmic flagging of listings with implausible price-to-brand ratios
- Seller history analysis — patterns of counterfeit complaints trigger review before the next listing goes live
- Brand verification partnerships — work with rights-holders to pre-authenticate high-risk categories
- Volume-based scrutiny — sellers listing 500+ items of a single luxury brand trigger automatic review
- Buyer disclosure requirements — flags on listings where authenticity cannot be verified
- Financial holds on new sellers in luxury goods categories until track record is established
- Direct data-sharing with major trademark holders on suspected counterfeit networks
- Seller identity verification for luxury good categories to reduce anonymous infringement
The Harder Question Your Professor May Push Back With
Even if you argue for going beyond the law, here’s the counterargument worth addressing: every one of those measures adds cost, reduces listing volume, and introduces friction that could drive sellers and buyers to competing platforms. The platform that voluntarily over-polices may lose to the platform that doesn’t. Does a race to the bottom in platform liability standards mean voluntary measures are commercially futile? That’s a genuinely difficult question — and engaging with it makes your answer much stronger than one that treats the ethical choice as cost-free.
How to Structure Your Written Responses
Here’s a clean structure for each question that works whether your professor wants a short discussion post, a full essay, or something in between. Adjust length to the assignment, but keep the logical sequence.
Verified External Source to Cite
For primary legal authority, cite the full case: Tiffany (NJ) Inc. v. eBay Inc., 600 F.3d 93 (2d Cir. 2010). For the original Inwood standard: Inwood Laboratories, Inc. v. Ives Laboratories, Inc., 456 U.S. 844 (1982). For academic commentary, the Harvard JOLT Digest summary at jolt.law.harvard.edu provides a reliable secondary source. Include at least one of these in your citations — your professor will expect engagement with primary legal sources, not just your own analysis.
FAQs: Tiffany v. eBay Assignment Questions
The Bottom Line on Both Questions
Question 1 has a clear analytical path: walk through Inwood, establish that it applies to eBay, show why Prong 1 doesn’t land, explain why generalized knowledge fails Prong 2, address willful blindness and why the court rejected it. The facts are what saved eBay — specifically, its practice of removing listings on notice and its investment in the VeRO program.
Question 2 is the one where you actually have to think and commit. The law answered the legal question. Your professor wants to know what you think about whether the law got it right — and what you’d do if you were running the platform. Take a position. Back it up. Address the obvious objection. That’s it.
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