Vaknin v. Gao
- P. Castel
- 1:25-cv-01245
- U.S. District Court · Southern District of New York
- 2
In Vaknin v. Gao, Judge Castel ordered plaintiffs to clarify the parties’ citizenship or face dismissal for lack of federal jurisdiction.
Michael Vaknin and Abraham Vaknin must obtain and plead the citizenship of all parties; Yang Gao, Hui Fang, and Shimeg Huang are subject to the plaintiffs’ limited citizenship interrogatories.
What happened
In Vaknin v. Gao, Michael Vaknin and Abraham Vaknin sued Yang Gao, Hui Fang, and Shimeg Huang, relying on diversity of citizenship to bring the case in federal court.
The court found that the complaint identified only the parties’ residences, not their citizenships or domiciles. It also explained that every plaintiff must be diverse from every defendant, and that certain combinations of foreign citizens could prevent diversity jurisdiction.
Judge P. Kevin Castel ordered the plaintiffs to serve limited questions seeking the defendants’ citizenships within 14 days and to amend the complaint to state all parties’ citizenships within 30 days. The order says the action will be dismissed for lack of subject-matter jurisdiction if they do not amend it.
The detailed version
- Vaknin v. Gao · No. 1:25-cv-01245
- P. Castel
- Feb. 13, 2025
Background
Michael Vaknin and Abraham Vaknin brought the action against Yang Gao, Hui Fang, and Shimeg Huang. The plaintiffs invoked diversity jurisdiction under 28 U.S.C. § 1332(a)(1), which can allow a federal court to hear a civil case involving more than $75,000 when the opposing parties are citizens of different states or otherwise satisfy the statute’s citizenship requirements.
Jurisdictional Deficiency
The complaint alleged that the plaintiffs were residents of New Jersey and that, “upon information and belief,” the defendants were residents of New York. The court explained that residence alone does not establish domicile, which determines an individual’s citizenship for diversity purposes. The complaint therefore failed to allege the parties’ citizenships.
The court also stated that all opposing parties must be completely diverse. It noted that diversity jurisdiction could be absent if foreign citizens appeared on both sides of the case in the circumstances described by the court.
Order
Within 14 days of the order, the plaintiffs must serve limited interrogatories—written questions used to obtain information—on the defendants seeking their citizenships. Within 30 days, the plaintiffs must amend the complaint to allege the citizenship of all parties. The court stated that the action will be dismissed for lack of subject-matter jurisdiction if the plaintiffs do not amend the complaint.
Judge P. Kevin Castel issued this order addressing the court’s subject-matter jurisdiction at the beginning of the case. The opinion does not decide the underlying claims.
Read the full 2-page opinion on CourtListener, the free public archive maintained by the Free Law Project.