Methods for sending

In Germany, e-invoicign must be according to the European standard E?16931. E-invoice delivery to customers can be done via 2 transport methods : E-mail and Peppol.

Below a summary per method:

Transport Type	Current Adoption Rate	What is needed	Associated file format
Email	Preferred by most receivers	Bill-to E-mail address of customer	Most common is ZUGFeRD, alternative can be XRechnung
Peppol	Accepted by a minority	Peppol registration info of the customer if existing	Determined by Billit based on Peppol registration