Poland's KSeF requires all original invoices in collective corrections, not external lists
Poland's tax authority confirms collective correction invoices in KSeF must list all original invoices in the structured XML file, not in separate PDFs or spreadsheets. Businesses hitting technical limits must split corrections across multiple invoices.
Poland’s tax authority has clarified that collective correction invoices issued through KSeF must contain a complete list of all original invoices in the structured electronic file itself. Sending the full list separately via PDF or spreadsheet does not meet legal requirements. When technical limits prevent inclusion of all references, taxpayers must issue multiple correction invoices instead.
Poland’s National Tax Information Director has confirmed that collective correction invoices issued through KSeF must include complete data for all original invoices being corrected within the structured XML file, not in external attachments.
According to an interpretation dated 16 July 2026, Article 106j(2) of the Polish VAT Act requires all original invoice references to appear in the mandatory FA(3) structure. Specifically, original invoice data must be shown in the DaneFaKorygowanej element, including the issue date, invoice number, and KSeF identification number.
Taxpayers cannot satisfy this requirement by including only a subset of invoice references in the KSeF document while supplying the complete list separately in a PDF attachment or spreadsheet. The structured data must be complete within the invoice itself.
When technical limits apply
Where the number of original invoices exceeds technical file size limits, taxpayers should not omit required data. Instead, they must issue multiple correction invoices. Each correction document must independently contain complete invoice references for the transactions included in that correction.
Technical file size limits do not provide a legal basis to omit required invoice data from the structured file.
Who this affects
This clarification is particularly relevant for businesses issuing:
- Year-end rebate adjustments
- Volume discounts
- Bonus settlements
- Other mass corrections involving large numbers of underlying invoices
The guidance reinforces KSeF’s core policy objective: ensuring that all legally required VAT information is available directly within the structured electronic invoice rather than through external documents. This principle will carry forward into future ViDA e-invoicing requirements across the EU.
Businesses may need to review ERP system configurations and invoice splitting logic to ensure compliance with the requirement.