[killerpopiller]

I am surprised that you have to pay for sending invoices. Thats not an issue in Germany.

[elric]

The problem, as far as I see it, isn't electronic invoicing in itself, or even the format. It's the usage of the PEPPOL network. The network isn't free. Nothing is stopping anyone from creating invoices in UBL format and sending those by email (or any other means). But in countries where usage of the PEPPOL network is required, that's no longer an option.