Manager of Mailing Standards U.S. Postal Service 475 L'Enfant Plaza SW, Room 3436 Washington DC 20260-3436 or via e-mail to IMB&EDOC@usps.gov
Green Bay (920) 662-1316 Madison (608) 223-1540 Wausau (715) 843-5243 Oshkosh (920) 232-6589