When:Where:Main Post Office 433 W. Harrison St. Chicago, IL 60699 Hosted By: Chicago Postal Customer Council The purpose of a Postal Customer Council (PCC) is to strengthen the working relationship between the United States Postal Service (USPS) and its customers. Register for this event now at : http://cpccmembership-rss.eventbrite.com Event Details: Come join the Chicago Postal Customer Council and learn how to get the most out of your postal dollars. The purpose of a Postal Customer Council (PCC) is to strengthen the working relationship between the United States Postal Service (USPS) and its customers. Membership includes free or reduce rates at most CPCC events.