- From 2026, most taxpayers in Poland must issue and receive structured invoices via the KSeF system.
- KSeF does not verify the substantive or accounting accuracy of invoices (e.g., dates, amounts, NIP numbers).
- Errors in invoices can result in loss of VAT deduction rights for buyers and tax liability for sellers, regardless of intent.
- The system mainly serves as a hub for sending, storing, and accessing invoices, not for checking their reliability.
- Issuing unreliable invoices can lead to tax risks, penalties, and even criminal liability.
Source: ksiegowosc.infor.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.
