You can print an invoice directly from your account:
I think you emailed about this several days ago, but when I replied the mail was bounced back:
Delivery to the following recipient failed permanently:
Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain 3bmarkets.gr by mail.3bmarkets.gr. [188.8.131.52].
The error that the other server returned was: