A Ninth Circuit panel considered whether the design of an app-based pickup system can contribute to a foreseeable imposter-driver risk even when the attacker was not the assigned driver.
When a person posing as an Uber driver allegedly assaulted a rider, the legal question was not simply whether Uber employed the attacker. A Ninth Circuit panel asked a more difficult question: can the way a platform structures pickup create or contribute to a foreseeable imposter-driver risk?
The Attacker Was Not the Plaintiff’s Authorized Uber Driver
The case reached the Ninth Circuit after a plaintiff alleged that a man posing as an Uber driver picked her up and assaulted her. The alleged attacker was a former Uber driver, but he was not the driver dispatched to her through the app for that ride. That fact made the usual employer-or-agency framing an awkward fit.
The district court dismissed the case. On appeal, however, a divided Ninth Circuit panel concluded that the plaintiff had adequately alleged a different type of duty theory under California law.
The Majority Focused on Alleged Platform-Created Risk
The panel majority treated the case as one involving alleged misfeasance rather than simply a failure to rescue someone from a danger Uber did not create. The reasoning was that Uber’s product and pickup model could allegedly contribute to the risk of imposter drivers by directing riders to wait for privately owned vehicles and rely on app-provided identifying information to recognize the correct car.
That did not mean the court found Uber caused the assault. The panel was deciding whether the case could proceed past the duty question. It expressly left breach and causation for later determination.
That Procedural Distinction Is Critical
A ruling that a defendant owes a duty is not a verdict that the defendant violated the duty. And even a breach finding would not automatically establish that the breach caused the plaintiff’s injury. The Ninth Circuit’s decision kept the theory alive; it did not resolve the ultimate merits.
That is particularly important here because the disposition was unpublished and designated “not for publication.” Under Ninth Circuit rules, unpublished dispositions generally are not treated as binding precedent in the same way as published opinions.
The Dissent Saw the Risk Differently
The panel was not unanimous. The dissent would have rejected the duty theory and relied more heavily on a California Court of Appeal decision that had declined to impose liability in similar imposter-driver litigation. That disagreement shows why the case is useful: reasonable judges framed the platform’s relationship to the danger in materially different ways.
Is an imposter driver an outside criminal actor whose conduct is too removed from the platform? Or did the platform’s pickup system help create a recurring opportunity for imposters to exploit riders? The duty analysis turns on how the law characterizes that relationship.
Safety Design Can Become Tort Evidence
Imposter-driver cases also show why product design and tort law increasingly overlap in rideshare litigation. Features such as license-plate display, driver photographs, PIN verification and in-app prompts are not merely conveniences. They can become evidence about what risks the company recognized and how it tried to address them.
The existence of a safety feature does not prove prior negligence, and the absence of one does not automatically create liability. But once a specific risk is known and recurring, the design choices around that risk can become part of the factual record.
The Practical Lesson Is Narrower Than “Uber Is Liable for Fake Drivers”
The Ninth Circuit did not announce a universal rule that Uber is responsible whenever an imposter commits a crime. It allowed a particular California-law theory to proceed based on the allegations before it. Different states can define duty differently, and later stages of a case still require proof of breach, causation and damages.
The broader point is durable: a rideshare company can face legal scrutiny for more than the conduct of an authorized driver. Courts may also examine whether the platform itself created, increased or failed to reasonably address a particular danger tied to the way rides are arranged.
Sources
This article is for general informational purposes and is not legal advice.

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