# DE-R-T02

> If both supplier and customer are located in Germany, BT-124 "External document location" must contain an absolute URL with valid scheme.

Checked against Peppol BIS Billing 3.0 2026.5

Canonical: https://einvoicecheck.eu/rules/de-r-t02

## Official rule text

If both supplier and customer are located in Germany, BT-124 "External document location" must contain an absolute URL with valid scheme.