← All Cases
2025 Term · 24-856

Cisco Systems, Inc. v. Doe I

Whether courts may compel disclosure of the identities of foreign tortfeasors sued in U.S. courts before the United States has established subject-matter jurisdiction or personal jurisdiction over those defendants.

Oral argument scheduled for April 28, 2026 at 10:00 a.m. ET

Background & Facts

Cisco Systems and other technology companies filed suit in federal court against unnamed foreign defendants (referred to as "Doe" defendants) for alleged violations of federal law, including claims arising from extraterritorial conduct. The respondents sought to keep their identities concealed pending resolution of jurisdictional questions. The central dispute concerns whether U.S. courts should force disclosure of defendant identities early in litigation, before establishing whether the court has authority to hear the case or can exercise power over the defendants.

The Ninth Circuit Court of Appeals ruled in July 2023 in favor of early disclosure, reasoning that plaintiffs have a substantial interest in identifying potential defendants and that unnamed defendants should not escape identification challenges. The Ninth Circuit's decision created tension with how other circuits handle such disclosures and raised concerns about protecting foreign nationals from premature legal exposure.

Why This Case Matters

This case addresses a fundamental procedural question about the balance between a plaintiff's right to pursue claims against unknown parties and a defendant's right to remain unnamed before a court establishes its jurisdiction. The decision will affect how technology companies, manufacturers, and other U.S. firms can pursue international litigation claims and may impact foreign policy considerations by determining when U.S. courts can require foreign nationals to be identified in litigation. The strong support from business groups and amici on Cisco's side, combined with the Solicitor General's involvement, suggests the Court may be reconsidering federal courts' authority to compel such disclosures in cases involving extraterritorial conduct or foreign defendants. The ruling could significantly reshape discovery and jurisdictional practice in cases involving international parties.

The Arguments

Oral argument is scheduled for April 28, 2026 at 10:00 a.m. ET. The positions below reflect each party’s written briefs. This section will be updated following argument.
Cisco Systems, Inc., et al.petitioner

Cisco argues that courts must compel disclosure of defendant identities as a prerequisite to establishing jurisdiction and pursuing claims. Cisco contends that unnamed defendants should not be able to avoid identification or challenge disclosure based on jurisdictional arguments that have not yet been resolved. The company maintains that forcing early disclosure serves the interests of justice and prevents foreign tortfeasors from using anonymity as a shield.

  • Plaintiffs have a constitutional and procedural right to identify potential defendants before litigation can proceed
  • Unnamed defendants should not obtain special protection from disclosure based on unresolved jurisdictional questions
  • Technology companies need to identify foreign bad actors engaged in unlawful conduct affecting U.S. markets
  • The Ninth Circuit's approach is consistent with federal discovery principles that broadly permit disclosure
Doe I, et al.respondent

Respondents argue that compelling disclosure of identities before jurisdiction is established violates fundamental due process and procedural fairness principles. They contend that unnamed defendants are entitled to a threshold determination of jurisdiction before being exposed to U.S. litigation and that early disclosure is premature and harmful, particularly for foreign nationals. Respondents emphasize that jurisdiction must be established before a court can exercise power over any defendant.

  • A court must establish subject-matter and personal jurisdiction before compelling disclosure that subjects defendants to litigation
  • Premature disclosure exposes foreign defendants to reputational harm and litigation burdens before jurisdiction is proper
  • Federal Rules of Civil Procedure require jurisdictional prerequisites to be satisfied before broader disclosure obligations attach
  • International comity and foreign relations concerns weigh against compelling disclosure of foreign nationals absent jurisdiction

Precedent Cases Cited

Legal Terminology