Enabling USPS address validation

  1. In the Configuration Editor, open the Resources configuration.
  2. Add the Address node as a child of the Resources node.
  3. Add the Validation node as a child of the Address node.
  4. Add these attributes to the Validation node:
    Validation Enabled
    Set the value to True.
    Service URL
    Specify http://production.shippingapis.com/ShippingAPI.dll.
  5. Add the Authentication node as a child of the Validation node.
  6. Add the Credentials node as a child of the Authentication node.
  7. Select the Credentials node and specify a user ID for the API in the User Name attribute.
    You can obtain a user ID from the Postal Service.
  8. Save your changes.