- The Danish Business Authority released OIOUBL 2.1 schematron version 1.16.0.
- The update improves e-invoice data quality with CO2 data checks and stricter currency code controls.
- CO2 data validation is optional but enforced if included; currency codes must be valid.
- The update does not change invoice structure but strengthens data validation.
- Implementation is required by November 27, 2025.
Source: fiscal-requirements.com
Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.
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