In the event that an order has been created with an unverified shipping address, the order's status will be listed as "Bad Address". To fix the order, a valid address will have to be entered using the Address Validation tool in the Marketplace Customer Service screen. Begin by searching for and selecting the affected order, and opening the Address Validation tab.
Within this tab you will find a shipping address field titled Shipping Label that is populated with the customer entered address. If it is set to something else, you can press Use Shipping Label Address to select the address on the shipping label. If you wish to check a different address than what was entered with the order, enter the new address here.
Press the large button located between the two address fields labeled Verify Address. The address that populates on the right is the corrected address. If there is an issue with the address, an error message will appear below the Verify Address button describing the issue, i.e.: "Invalid City", "Street not Found", etc.. You must work with the customer to find a validated shipping address. To communicate with the customer you can use the Communication tool, which has it's own tab in the Customer Service screen.
Once a validated shipping address has been found, you may then reprocess the order with the new address.