# PEPPOL-EN16931-R020

> The Seller electronic address (BT-34) must be provided. Add cac:AccountingSupplierParty/cbc:EndpointID with its schemeID.

Checked against Peppol BIS Billing 3.0 2026.5

Canonical: https://einvoicecheck.eu/rules/peppol-en16931-r020

## Official rule text

Seller electronic address MUST be provided

## Why did my invoice fail PEPPOL-EN16931-R020?

The Seller electronic address (BT-34) must be present. It is the Peppol endpoint identifier of the sender, required for identification and reply routing, and is carried in cac:AccountingSupplierParty/cac:Party/cbc:EndpointID together with a scheme in @schemeID.

## Common causes

- cbc:EndpointID is missing from the supplier party.
- The schemeID attribute identifying the address scheme is not set.
- The seller's own Peppol participant ID is not configured in the invoicing system.

## How do I fix it?

```
<cac:AccountingSupplierParty><cac:Party><cbc:EndpointID schemeID="0192">991825827</cbc:EndpointID></cac:Party></cac:AccountingSupplierParty>
```