The Internal Revenue Service seized real property owned by petitioner (hereinafter Grable) to satisfy a federal tax delinquency, and gave Grable notice by certified mail before selling the property to respondent (hereinafter Darue). Grable subsequently brought a quiet title action in state court, claiming that Darue's title was invalid because 26 U. S. C. §6335 required the IRS to give Grable notice of the sale by personal service, not certified mail. Darue removed the case to Federal District Court as presenting a federal question because the title claim depended on an interpretation of federal tax law. The District Court declined to remand the case, finding that it posed a significant federal-law question, and it granted Darue summary judgment on the merits. The Sixth Circuit affirmed, and this Court granted certiorari on the jurisdictional question.

Held: The national interest in providing a federal forum for federal tax litigation is sufficiently substantial to support the exercise of federal-question jurisdiction over the disputed issue on removal. Pp. 3-11.

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