Who Has The Burden Of Proof For Diversity in Civil Procedure?

The party asserting diversity jurisdiction has the burden of proof to establish the complete diversity of citizenship and the amount in controversy sufficient for federal jurisdiction.

In civil procedure, diversity jurisdiction allows federal courts to hear cases involving parties from different states. The party seeking to invoke federal jurisdiction, usually the plaintiff, carries the burden of proof to demonstrate both that the parties are citizens of different states and that the amount in controversy exceeds the jurisdictional threshold, currently set at $75,000. This is essential to avoid the potential bias that might arise from state courts adjudicating disputes involving citizens of their own state.

The United States Supreme Court has emphasized this requirement in several key cases. For instance, in *Strawbridge v. Curtiss* (1806), the Court held that all plaintiffs must be citizens of different states from all defendants for diversity to apply. Additionally, in *McNutt v. General Motors Acceptance Corp.* (1945), the Court indicated that the party asserting jurisdiction must present evidence sufficient to support the claim of diversity.

Furthermore, the burden remains on the plaintiff to maintain this proof throughout any procedural challenges regarding jurisdiction. If the defendant contests diversity jurisdiction, it then becomes the plaintiff’s responsibility to produce evidence of the parties’ citizenship or risk dismissal of the case for lack of jurisdiction.

In practical terms, evidence may include things like affidavits, declarations, or other documentation establishing the domicile of the parties. It’s important for students to grasp that failing to satisfy the burden of proof on diversity can lead to the case being dismissed at an early stage, resulting in potentially significant delays and additional litigation costs for the plaintiff.

• 1Strawbridge v. Curtiss (1806) - established that complete diversity is required for jurisdiction.
• 2McNutt v. General Motors Acceptance Corp. (1945) - clarified that the party asserting diversity must prove jurisdiction.
• 3Caterpillar Inc. v. Lewis (1996) - emphasized the need to assess jurisdiction at the time of filing.
• 4Kroger Co. v. Malease H. Smith Enterprises, Inc. (2000) - reinforced rules on citizenship for corporations.

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