Jurisdictional facts
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
Those matters of fact which must exist before the court can properly take jurisdiction of the particular case, as, that the defendant has been properly served with process, that the amount in controversy exceeds a certain sum, that the parties are citizens of different states, etc.
Noble v. Railroad Co., 147 U. S. 165 , 13 Sup. Ct. 271, 37 L. Ed. 123.