Envelope Address Format and Layout
Domestic Address Format
Please reference the following link for different address elements placement.
http://pe.usps.com/text/pub28/28c2_001.htm#ep526236
Sample:
International Address Format
http://pe.usps.com/text/pub28/28apa_004.htm
Canada Only: http://pe.usps.com/text/pub28/28apa_005.htm
Sample:
Envelope Layout
