Discover what a diversity of citizenship case is; that in a diversity of citizenship case the proper citizenship must exist both when the action is commenced at the state level and when the petition for removal is filed at the federal level. See that a corporation, partnership, limited liability company, alien, citizen of the United States, and a citizen of a State who is not a citizen of the United States, can be a party to such an action.

Legal authority quoted, cited, and linked. Also links to more detailed information on diversity of citizenship included.