Invoices are emailed to the customer

When you press Issue invoice, the customer gets the invoice by email straight away, as a PDF attachment in the invoice's language. You no longer have to send it by hand, and a buyer without an account in your shop receives it too.

On the order detail, the new Invoice block shows whether the customer received it: Sent with the address and the time, or Not sent when the email did not go out. Send again sends it once more, and if the customer's address is wrong you correct it in the same window and the new address is saved on the order. Invoices issued until now are not mailed on their own: you send them with Send to customer when you choose.