Practical International Data Management - Mailing address
A mailing address is one which is not a geographical (street) location or one directed to a large user. Mailing addresses contain post office box numbers, private bag information, a route indicator or any other postal device for delivery.
A mailing address may contain one or more of these elements:
The mailing delivery type (postbox, private bag, poste-restante, rural route etc.)
mailing addresses and street addresses should not be added to the same fields in databases. They may have different postal codes and/or place name and using both forms together may create an undeliverable address.
Post office boxes and other mailing address types are not always defined by numbers. They may contain prefixes and suffixes, so this data should not be stored in a numeric field in a database.