The court determined that a default judgment entered 7 years ago awarding the debtor sanctions against a corporate creditor was void because the debtor failed to properly serve the creditor with the sanctions motion and notice of hearing. The Court determined that Bankruptcy Rule 7004(b)(3) required the debtor to direct her motion and notice of hearing to an officer or an authorized agent of the creditor. Because the motion and the notice of hearing was only sent to a P.O. Box or a street address, and did not identify an officer or a registered agent of the creditor, service was inadequate. Accordingly, when the creditor moved to reopen the case and vacate the judgment, the court concluded that cause existed to grant both motions.