Secondary Copyright Liability

By Hank FasthoffNovember 27, 2016

Copyright law can impose liability on a platform, service provider, employer, distributor, or business partner for another person's infringement. Under each theory, you must prove conduct by the defendant and connect it to identified acts of direct infringement.

The Supreme Court recognized two categories of secondary copyright liability. Under contributory liability, a court asks whether the defendant intended users to infringe with its product or service. Vicarious liability turns on control over the direct infringer and financial benefit from the infringement. Which theory you plead controls what evidence counts.

Direct Infringement Is the First Element

A secondary liability claim depends on direct infringement by someone else. A claimant has to name the protected right, the infringing act, and whoever committed it. Section 501(a) defines an infringer as anyone who violates one of the copyright owner's exclusive rights.

The direct infringer doesn't have to be a named defendant in every case. Even so, the claimant has to prove the underlying infringement. A claimant needs infringing conduct before either contributory or vicarious liability can apply.

Cox Replaced the Knowledge Plus Assistance Formula

Older opinions often described contributory infringement as knowledge of infringing activity plus inducement, causation, or material contribution. The Fifth Circuit used that formulation in Alcatel USA, Inc. v. DGI Technologies, Inc., 166 F.3d 772 (5th Cir. 1999). Cox displaced that formulation as the complete standard.

In Cox Communications, Inc. v. Sony Music Entertainment, 607 U.S. 583 (2026), the Supreme Court held that a service provider is contributorily liable for a user's infringement only if the provider intended the service to be used for infringement. The majority identified two ways to prove that intent. A claimant can show that the defendant induced infringement or supplied a service tailored to infringement, meaning one with no substantial lawful use.

Knowledge by itself doesn't satisfy the standard. Cox received 163,148 notices associating subscriber internet protocol addresses with infringement during the period at issue. The Court nevertheless found no contributory liability from supplying ordinary internet access, even to subscribers connected with infringement. A failure to stop another person's unlawful use also doesn't establish intent on its own.

Inducement Requires Purposeful Conduct

Inducement focuses on conduct meant to promote infringement. In Metro-Goldwyn-Mayer Studios Inc. v. Grokster, Ltd., 545 U.S. 913 (2005), the Supreme Court held that a distributor can face liability when it promotes a product's use for infringement through purposeful expression or other affirmative conduct.

Grokster involved efforts to attract former users of infringing file sharing services, business plans aimed at demand for unauthorized copying, and revenue that increased with network use. The distributors also declined to develop filtering tools. Within the full record, the Court treated that omission as one supporting fact. A failure to prevent infringement can't establish liability by itself when a product has substantial lawful uses.

Marketing language, internal messages, sales strategy, product instructions, customer support, and compensation terms can show purpose. Ordinary technical support and product updates don't establish inducement without evidence that connects those acts to an objective of promoting infringement.

A Service Tailored to Infringement Has No Substantial Lawful Use

The second basis concerns a product or service designed for infringement. Cox described a service as tailored to infringement when it lacks substantial or commercially significant lawful uses. That rule comes from Sony Corp. of America v. Universal City Studios, Inc., 464 U.S. 417 (1984).

Sony's Betamax recorder could copy television programs without permission, but it also supported substantial lawful uses such as recording a program for personal viewing at another time. Its sale to the public therefore didn't create contributory liability. Cox applied the same principle to ordinary internet access, a service that supports extensive lawful activity and that Cox never designed to promote infringement.

A high volume of unlawful use doesn't alone make a dual use service tailored to infringement. Product architecture, intended function, available lawful uses, promotional statements, and design choices supply the relevant proof. A claimant has to connect those facts to intent under one of the two forms recognized in Cox.

The Fifth Circuit Has to Apply Cox

The Supreme Court's ruling displaced a recent Fifth Circuit decision involving another internet service provider. In UMG Recordings, Inc. v. Grande Communications Networks, LLC, 118 F.4th 697 (5th Cir. 2024), the Fifth Circuit affirmed contributory liability based on continued service to subscribers associated with repeated infringement and the provider's failure to take basic preventive measures.

On April 6, 2026, the Supreme Court vacated that judgment and remanded the case for reconsideration under Cox. By vacating the judgment, the Supreme Court removed Grande as current authority for the proposition that knowledge plus continued service establishes contributory liability. Fifth Circuit cases using the older knowledge and material contribution formula now require the intent analysis the Supreme Court adopted in Cox.

Vicarious Liability Requires Control and Direct Financial Benefit

Vicarious copyright liability turns on a different test. You may face liability when you have the right and ability to supervise the direct infringer and profit directly from the infringement. Grokster stated both elements, and Cox addressed contributory liability without altering them.

A defendant may exercise control through contractual authority or a practical ability to stop or limit the infringement. Technical permissions, approval rights, and operating practices inform the inquiry. Vicarious liability doesn't require the same proof of intent that contributory liability requires, but both control and direct financial benefit must be present.

The infringement itself has to produce the financial benefit. In the lower court decision in the Cox litigation, the Fourth Circuit held that flat monthly internet fees didn't satisfy this element because subscribers paid the same amount regardless of their online conduct. Sony Music Entertainment v. Cox Communications, Inc., 93 F.4th 222 (4th Cir. 2024). Revenue may qualify when infringement attracts customers, increases what they pay, raises sales, or supplies another economic benefit tied to the unlawful activity.

Employment and Contract Relationships Require Separate Review

Vicarious liability developed from agency principles. Courts apply it beyond conventional employment relationships, and an employer may face liability when an employee infringes within the scope of employment. They also apply the control and direct benefit test to other arrangements under copyright law, as Gershwin Publishing Corp. v. Columbia Artists Management, Inc. explained.

Independent contractors, licensees, distributors, affiliates, publishers, record labels, and platform users require separate analysis. A title, ownership interest, royalty share, or contract right doesn't establish secondary liability by itself. The evidence has to show inducement or a service tailored to infringement, or the combination of supervisory authority and direct financial benefit required for vicarious liability.

Contract terms can allocate clearance duties, approval rights, defense obligations, and economic risk between the parties. Those provisions don't bind a copyright owner who never agreed to them. A party's conduct under the contract may also supply evidence of control, purpose, or benefit.

DMCA Safe Harbors Address Remedies Rather Than the Liability Standard

If you operate an online service, Section 512 requires separate analysis. Its safe harbors limit remedies for qualifying transmission, caching, storage, and information location functions. Eligibility depends on the requirements for the provider's function, along with conditions such as a reasonably implemented repeat infringer policy and accommodation of standard technical measures.

Losing safe harbor protection doesn't establish secondary liability. Section 512(l) provides that a failure to qualify can't weigh against a defense that the provider's conduct wasn't infringing. Cox relied on that language when it rejected the argument that a provider outside the safe harbor must face liability for serving subscribers associated with infringement.

Notices can establish what the provider knew, trigger duties within a safe harbor, and become part of the evidentiary record. After Cox, notice can't substitute for proof that the provider intended its service to be used for infringement.

The Evidence Should Match the Asserted Theory

You should begin with the direct infringement and then separate the evidence by theory. For contributory liability, relevant materials include product design, marketing, internal communications, user instructions, support records, infringement notices, enforcement practices, filtering decisions, and business plans. Those materials must show either inducement or a service tailored to infringement.

For vicarious liability, your record should identify contractual authority, technical control, approval rights, termination power, revenue sources, pricing, customer acquisition, and financial links to the infringing conduct. Mixing the two theories can obscure a missing element. A defendant's knowledge may be extensive while proof of intent remains absent, and broad authority may exist without a direct financial benefit from infringement.

Secondary liability turns on the defendant's conduct, product design, control, and financial benefit. Under Cox, knowledge and inaction alone don't impose contributory liability on providers of products and services with substantial lawful uses. Liability can attach when the evidence proves purposeful inducement, a service tailored to infringement, or the separate elements of vicarious liability.