Stamps are for sale, and our Business Center offers shipping services. Please refer to your Event Manager if you would like to arrange an on-site service for your group. If you have a large number of items that need to be mailed, or require shipping materials, we suggest the United States Post Office located at:
1400 L Street, NW Lobby
Washington, DC 20005
Phone: (202) 842-1350
Their hours are 9 a.m. - 5 p.m. weekdays, and closed on Saturdays.