Format
OIOUBL
Denmark's national UBL-based e-invoice format, used with NemHandel and aligned with EN 16931.
Key points
- Denmark supports both OIOUBL and Peppol BIS Billing 3.0.
- OIOUBL 3.0 introduces structured invoice responses; the EC factsheet expected it to become mandatory from 15 Nov 2025 with OIOUBL 2.1 phased out by 15 May 2026.
Countries using it
Countries whose official sources name this format (or a format based on it), in our data.
Sources
Last verified . Always check the official source before acting.