The U.S. Supreme Court case Grupo Dataflux v. Atlas Global Group, L.P., et al., 2003 revolved around the issue of diversity jurisdiction in federal courts. The plaintiff, Atlas Global Group (a partnership formed under Texas law), included a Mexican corporation as one of its partners and filed suit against Grupo Dataflux (a Mexican corporation) in a Federal District Court for breach of contract and fraud claims. However, it was later discovered that at the time when the lawsuit was initiated, not all partners were American citizens which is required to establish diversity jurisdiction - an essential requirement for hearing cases in federal court instead of state court. Grupo Dataflux argued that since complete diversity did not exist at the time when the lawsuit was filed, thus rendering it ineligible for federal court consideration from inception; therefore any subsequent rulings should be nullified including $40 million judgment awarded to Atlas by jury trial. The Supreme Court agreed with this argument stating that "time-of-filing" rule applies i.e., if there's no complete diversity among parties involved at filing time then such cases are beyond purview of federal courts' authority regardless how circumstances may change afterwards.

In the dissenting opinion for Grupo Dataflux v. Atlas Global Group, L.P., Justice Ginsburg argued that the majority's decision was too rigid and failed to consider practical implications. She contended that a corporation should not be denied access to federal courts simply because it mistakenly identified itself as a U.S. entity when it was actually foreign-owned at the time of filing suit. Ginsburg pointed out that such an error could easily be corrected without dismissing the case entirely, especially since there were no allegations of bad faith or attempts to manipulate jurisdictional rules by Atlas Global Group in this instance. She also emphasized that allowing such cases to proceed would not flood federal courts with litigation from foreign corporations but rather ensure fair treatment for all parties involved.