opinion: Per Curiam.
  Respondent, Hawkeye-Security Insurance Company, filed a motion to quash the return of service of summons on the grounds that the District Court acquired no personal jurisdiction over it and that the power of attorney which it had filed with the Commissioner of Motor Vehicles of the State of Wisconsin did not authorize him to accept service of process for it in this case. After this motion was denied, respondent filed its answer to the complaint in which it again pressed its claim that the District Court lacked personal jurisdiction over it. Subsequently, however, respondent filed (1) a motion to amend its answer and to interplead; (2) a counterclaim; (3) a stipulation and order adding a party-plaintiff and amending the complaint and answer; and (4) a stipulation that judgment be entered against the alleged insured in favor of the additional party-plaintiff. The latter stipulation included the following provision, together with others consistent with it and confirmatory of its purpose:
  “1. That each of the parties to this stipulation voluntarily submits to the jurisdiction of the above entitled Court without service of process herein, the same as if personal service had been obtained by each against the other.”
  Following a trial on the merits, judgment was entered against respondent, but the Court of Appeals, with one judge dissenting, reversed on the ground that respondent’s motion to quash should have been granted. 226 F. 2d 126.
  Upon examination of the record and the law, we conclude that the District Court had jurisdiction of the subject matter and that respondent, by its stipulation, waived any right to assert a lack of personal jurisdiction over it. We, therefore, reverse the judgment of the Court of Appeals and remand the case to it for further proceedings.
  Reversed and remanded.
choices: comity: civil rights comity: criminal procedure comity: First Amendment comity: habeas corpus comity: military comity: obscenity comity: privacy comity: miscellaneous comity primarily removal cases, civil procedure (cf. comity, criminal and First Amendment); deference to foreign judicial tribunals assessment of costs or damages: as part of a court order Federal Rules of Civil Procedure including Supreme Court Rules, application of the Federal Rules of Evidence, Federal Rules of Appellate Procedure in civil litigation, Circuit Court Rules, and state rules and admiralty rules judicial review of administrative agency's or administrative official's actions and procedures mootness (cf. standing to sue: live dispute) venue no merits: writ improvidently granted no merits: dismissed or affirmed for want of a substantial or properly presented federal question, or a nonsuit no merits: dismissed or affirmed for want of jurisdiction (cf. judicial administration: Supreme Court jurisdiction or authority on appeal from federal district courts or courts of appeals) no merits: adequate non-federal grounds for decision no merits: remand to determine basis of state or federal court decision (cf. judicial administration: state law) no merits: miscellaneous standing to sue: adversary parties standing to sue: direct injury standing to sue: legal injury standing to sue: personal injury standing to sue: justiciable question standing to sue: live dispute standing to sue: parens patriae standing standing to sue: statutory standing standing to sue: private or implied cause of action standing to sue: taxpayer's suit standing to sue: miscellaneous judicial administration: jurisdiction or authority of federal district courts or territorial courts judicial administration: jurisdiction or authority of federal courts of appeals judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from federal district courts or courts of appeals (cf. 753) judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from highest state court judicial administration: jurisdiction or authority of the Court of Claims judicial administration: Supreme Court's original jurisdiction judicial administration: review of non-final order judicial administration: change in state law (cf. no merits: remand to determine basis of state court decision) judicial administration: federal question (cf. no merits: dismissed for want of a substantial or properly presented federal question) judicial administration: ancillary or pendent jurisdiction judicial administration: extraordinary relief (e.g., mandamus, injunction) judicial administration: certification (cf. objection to reason for denial of certiorari or appeal) judicial administration: resolution of circuit conflict, or conflict between or among other courts judicial administration: objection to reason for denial of certiorari or appeal judicial administration: collateral estoppel or res judicata judicial administration: interpleader judicial administration: untimely filing judicial administration: Act of State doctrine judicial administration: miscellaneous Supreme Court's certiorari, writ of error, or appeals jurisdiction miscellaneous judicial power, especially diversity jurisdiction