USPS Address Validations

Every software which runs in USA must follow USPS Address rules.
This helps in UI Validations, DB Design and Interfaces.

https://www.usps.com/nationalpremieraccounts/manageprocessandaddress.htm
https://www.usps.com/business/address-quality-services.htm
https://ribbs.usps.gov/aec/documents/tech_guides/AEC_AECII_UG.PDF
AEC_AECII_UG.pdf Downloaded from above link on 08/08/2013