Pennoyer v. Neff

Since the adoption of U.S. Const. amend. XIV , the validity of judgments against persons who have not been personally summoned or had notice of the proceeding may be directly questioned, and their enforcement in the State resisted, on the ground that proceedings in a court of justice to determine the personal rights and obligations of parties over whom that court has no jurisdiction do not constitute due process of law.

Brief Fact Summary:

Proceedings in a court of law to determine the personal rights and obligations of parties over whom the court has not jurisdiction are invalid for want of due process of law.

Case Commentary:

States have the authority to control and regulate property within their borders, even if that regulation affects the rights of people and property outside the state. This power does not extend to bringing people or property outside the state into its jurisdiction.