This excerpt taken from the NAV DEF 14A filed Jan 16, 2009.
Q: What is house-holding?
A: If you and other residents at your mailing address own shares of Navistar common stock in street name, your broker or bank may have notified you that your household will receive only one annual report and proxy statement for each corporation in which you hold stock through that broker or bank. In this practice known as house-holding, you were deemed to have consented to that process. House-holding benefits both you and the Company because it reduces the volume of duplicate information received at your household and helps the Company to reduce expenses. Accordingly, the Company and your broker or bank will send one copy of our annual report and proxy statement to your address. Each stockholder will continue to receive a separate proxy card or voting instruction card. We will promptly deliver an additional copy of either document to you if you call or write us at the following address or phone number: Investor Relations, Navistar International Corporation, 4201 Winfield Road, P.O. Box 1488, Warrenville, Illinois 60555, (630) 753-2143.