Security and Disinformation in the National e-Invoicing System: Facts, Myths, and Implementation Timeline

• Press briefings addressed misinformation about the National e-Invoice System (KSeF) and aimed to provide accurate information.
• From February 1, 2026, the largest companies must issue invoices via KSeF; smaller companies follow in April 2026, and all others by January 2027.
• KSeF is built on Polish infrastructure, uses advanced encryption, meets critical infrastructure security standards, and has passed extensive cybersecurity testing.
• The system is not a surveillance tool; it does not expand data access for authorities, only changes data processing methods.
• KSeF data is not publicly available and is processed under strict controls.

Source: gov.pl

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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