AccuZip is a database that validates and formats addresses according to USPS Publication 28. It is capable of processing address information from all US States and territories, including APO/FPO addresses.
AccuZip cross checks incomplete or incorrect addresses against correct ZIP Codes + 4 or produces a correct zip +4 from a correct address. With AccuZip, you can dramatically improve the accuracy of your address data as well as reduce the time spent verifying it.
In the example, the Country field is checked to see if it is blank.
Since the country field label specifies that it is for non-US citizens, use the absence of any data in this field as a trigger to use AccuZip to validate the information in the Address, City, State, and Zip fields.
' Perform AccuZip Only on US Addresses