Denmark announces upcoming changes to its e-invoicing format.

Denmark announces upcoming changes to its e-invoicing format. Denmark is set to implement significant updates to its e-invoicing system with the introduction of OIOUBL 3, a new version of its electronic invoicing format. This update was presented by Nemhandel (a Danish e-invoicing infrastructure) on November 21, 2024, and includes several key enhancements aimed at improving compliance with European standards and streamlining invoice processing. The OIOUBL 3 Invoice Package introduces mandatory invoice message responses, aligning with the European e-invoicing standard (EN 16931). The package consists of various components, including: Business Interoperability Specification (BIS) for invoices and credit notes. Message Level Response specifications, which separate business-level responses from message-level responses. A migration plan detailing essential dates for transitioning from the older OIOUBL 2.1 format to OIOUBL 3. Several critical changes are being introduced with OIOUBL 3: Separation of Responses: The new format distinguishes between message-level and business-level responses, requiring different profiles for each. Mandatory Two-Way Profiles: All users must receive invoice responses at a registered endpoint, eliminating the use of multiple profiles. Field Definitions and Interpretations: Free-text fields will now be read-only, while some structured fields will be editable. Clarifications on supported fields have also been provided. Revisions for Compliance: Adjustments have been made to ensure alignment with EN 16931, including remapping fields and changing calculations. For businesses sending invoices under the new OIOUBL 3 format, it is essential to register as suppliers in the Nemhandelsregistret (NHR) and adopt both mandatory document profiles. Invoice receivers will need to maintain compatibility with both OIOUBL 2.1 and OIOUBL 3 formats throughout the migration period. In addition, the Danish Business Authority has announced a migration plan, stipulating timelines for the migration between the current format, OIOUBL 2.1, and its replacer, OIOUBL 3: OIOUBL 3 release candidate: 15 November 2024; Deadline for remarks on release candidate: 6 March 2025; OIOUBL 3 final release: 10 April 2025; OIOUBL 3 voluntary support: 15 May 2025; OIOUBL 3 mandatory support: 15 November 2025; OIOUBL 2.1 no longer supported: 15 May 2026. These changes reflect Denmark's ongoing commitment to modernizing its e-invoicing framework and ensuring compliance with European standards.