Poland's Ministry of Finance is inviting market feedback on a proposed business event model for its KSeF 2.0 e-invoicing platform, which would introduce an event-based system to track and synchronise invoice changes while preserving complete audit histories. The consultation runs until 8 May 2026.
Poland’s Ministry of Finance has opened a public consultation on proposed changes to its national e-invoicing platform, KSeF 2.0, focusing on how invoice-related business events and data changes should be handled and synchronised.
The consultation, launched on 23 April 2026, invites market participants to provide feedback on a new approach to tracking invoice changes before final implementation decisions are made.
Two-part proposal
The Ministry’s proposal addresses two distinct areas requiring stakeholder input.
Technical synchronisation mechanism
The first component involves developing a permanent system for exchanging information about changes to invoices. This would establish a standardised method for synchronising documents and related business events across the platform. Under the proposed model, KSeF would continue storing structured invoices as it currently does, but would additionally record business data as separate events linked to each invoice. Importantly, this approach would not alter the structured invoice data already stored in the system.
Business events catalogue
The second element focuses on defining which types of business events should be captured. Rather than overwriting a single status field each time something changes, the new system would store each change as a distinct event with its own identifier, creation date, and author information.
This event-based approach aims to preserve a complete history of changes, allowing users to reconstruct an invoice’s current state by reviewing the sequence of recorded events.
The Ministry emphasised that the business events catalogue requires a separate, detailed discussion considering various business perspectives. Stakeholders are encouraged to keep feedback on specific event types distinct from comments on the overall architectural direction, which remains the primary focus of this consultation.
The deadline for sending comments is 8 May 2026, and they can be sent to the following address: Konsulta.ksef@mf.gov.pl.
Earlier, Poland’s Ministry of Finance released the test (integration) environment of the KSeF 2.0 API programming interface on 30 September 2025.
