We are leaving in 2 days and it jsut turned up. But a couple of days ago I contacted disney photo pass support and they said providing you bring your order number with you to the photo shop they will be able to call the support centre on your behalf and confirm that you ordered it at least 14 days earlier.
Providing you have ordered it at least 14 days earlier they will give you the photo pass there without your voucher.
But make sure you have your order number with you printed out.