In accordance with CASS requirements, if there are two addresses on the same line, referred to as a dual address, the US Postal Matcher may require both addresses for lookup. Therefore, the Customer Data Parser needs to pass both addresses to the US Postal Matcher.
When dual address occurs on different lines, the address that is the closest to the geography line is passed to the US Postal Matcher.
Currently, the Customer Data Parser handles the following dual address cases:
- Street name / general delivery
- General delivery / street name
- Street name / PO box
- PO box / street name
- General delivery / PO box
- PO box / general delivery
- Rural route / general delivery
- General delivery / rural route
- Rural route / PO box
- PO box / rural route
- Street name / rural route
- Rural route / street name
See US Dual Address Handling to learn how a dual address is handled.