Poland's National e-Invoice System receives major upgrades, including streamlined authentication via the mObywatel app and banking credentials, while a revised KSeF 2.0 Manual introduces essential changes for the mandatory e-invoicing era beginning in February 2026.
Poland has modernised its National e-Invoice System (KSeF) through two major developments: expanded login capabilities launched on 14 February 2026, and a comprehensive manual update for KSeF 2.0.
Streamlined access through multiple authentication methods
The integration with the National Electronic Identification Node (KWIE) now allows users to access KSeF via the mObywatel mobile app, mojeID banking credentials, e-ID, and trusted profile.
Authentication through mObywatel is straightforward—users select login.gov.pl, scan a QR code with their mobile app, and confirm data sharing. This eliminates the need for separate passwords while maintaining robust security through a unified framework developed with the Central Information Technology Centre (COI).
Manual revisions address the mandatory KSeF era
The Polish Ministry of Finance published updated versions of the KSeF Manual, Parts I, II, and III, on the official KSeF website on 9 February 2026.
Part I now reflects current exclusion regulations and updated transaction types. From February 2026 onward, certificate applications must be submitted exclusively through API KSeF 2.0 or the KSeF Taxpayer App, as the MCU platform has been integrated into the app. A new chapter covers authentication during business transitions, including liquidations, inheritances, and corporate transformations.
Part II clarifies invoice obligations, exemption limitations, and VAT deduction rules for invoices issued outside KSeF between February and December 2026. Enhanced features include updated Official Proof of Receipt (UPO) formats and improved QR code scanning that displays KSeF number assignment dates and document verification.
Part III includes new subsections on filing applications with the e-Tax Office to issue invoices with attachments in KSeF and on notifying authorities to stop such issuances. Additionally, updates clarify self-billing requirements for transactions involving foreign taxpayers without a Polish NIP, for transactions exempt from mandatory KSeF, and for cases where KSeF use is not possible.
Earlier, Poland’s Ministry of Finance launched the national e-invoice system (KSeF 2.0) on 1 February 2026.
