Legal Memorandum: Determination of Citizenship

Issue: For purposes of diversity jurisdiction, when is the citizenship of a party considered?

Area of Law: Litigation & Procedure
Keywords: Citizenship at the time the complaint; Diversity jurisdiction
Jurisdiction: Federal
Cited Cases: 85 F.3d 244; 615 F.2d 1176
Cited Statutes: 28 U.S.C. § 1332(a)(1), § 1332(a)(2)
Date: 05/01/2005

In order for jurisdiction under either § 1332(a)(1) or § 1332(a)(2) to be appropriate, the each party’s citizenship at the time the complaint was filed must be determined.   Newman-Green, Inc. v. Alfonzo-Larrain, 490 U.S. 826, 830 (1989); Sadat v. Mertes, 615 F.2d 1176, 1180 (7th Cir. 1980); Coury v. Prot, 85 F.3d 244, 248 (5th Cir. 1996).  Any change in citizenship or domicile after the complaint is filed is immaterial to diversity jurisdiction.  Id.; Sadat v. Mertes, 615 F.2d at 1180 n.3. 


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