Shopp store owners who are using the UPS shipping add-on and set an incorrect base of operations via WP-admin → Shopp Setup may have problems with their store. Specifically, their customers may see the error below when attempting to retrieve shipping rates.
UPS — The postal code xxxxx is invalid for AL United States.
This is a configuration issue with the store settings and is not caused by the end-user (customer).
This error is caused by a mismatch of the zip code & state. For example, lets take a look at the error below:
UPS — The postal code 90210 is invalid for AL United States.
The issue is not apparent but on a closer look we see that the zip code 90210 is for the state of California.
To correct this configuration issue, go to WP-admin → Shopp Setup and change Alabama (AL) to your correct state. Then Save Changes.