As a final sanity check, you may want to verify your addresses:

The quickest way with US addresses is to use Scrape::USPS::ZipLookup to scrape the United States Postal Service Zip Code Service.

It'll verify that your resultant combination of street address/city/state/zip against the UPS's own postal address database.

From the pod doco:

        #!/usr/bin/perl

         use Scrape::USPS::ZipLookup::Address;
         use Scrape::USPS::ZipLookup;

         my $addr = Scrape::USPS::ZipLookup::Address->new(
           'Focus Research, Inc.',                # Firm
           '',                                    # Urbanization
           '8080 Beckett Center Drive Suite 203', # Delivery Address
           'West Chester',                        # City
           'OH',                                  # State
           '45069-5001'                           # ZIP Code
         );
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