DE-R-011
A Peppol Germany national rule (DE-R-*) – applies when the invoice is sent over the Peppol network to a receiver in Germany.
What this error means
DE-R-011
When both seller and buyer are located in Germany and a deliver-to address (BG-15) is given, the deliver-to post code (BT-78) must be provided.
How to fix it
Fill in cbc:PostalZone in the cac:Delivery address block.