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2026: Mandatory B2B E-Invoicing in Europe—Key Countries, Deadlines, and Compliance Changes

  • In 2026, mandatory B2B e-invoicing becomes a legal requirement in several key European countries, replacing paper and PDF invoices with structured electronic formats.
  • Poland, Croatia, France, and Belgium will implement national e-invoicing systems with varying models and deadlines throughout 2026.
  • Businesses must use structured formats (such as UBL, CII, EN 16931), and validation will occur automatically and in real time.
  • Companies operating in multiple countries must adapt to different technical models and systems.
  • Early preparation is crucial to avoid increased costs and compliance risks, as e-invoicing is now a legal obligation, not just a future plan.

Source: docnova.ai

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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