For jurisdiction to be valid under a state’s long arm statute, the Due Process Clause requires that notice of the pending action be provided. In addition to the requirement that the defendant have such minimum contacts with the forum to render the exercise of jurisdiction there fair and reasonable, federal due process also requires that a reasonable method be used to notify the defendant of a pending lawsuit so that she may have an opportunity to appear and be heard. Although the Federal Rules of Civil Procedure (Rule 4) and state statutes require service using particular methods so that the defendant is notified of the suit, they do not replace the federal constitutional requirement that notice be provided for jurisdiction to be valid. To be constitutional, the method used for service, even if authorized by a federal rule or state statute, must be reasonably calculated to notify the defendant of the pending lawsuit