- From 2026, most taxpayers in Poland must issue and receive structured invoices via KSeF.
- KSeF does not verify the substantive or accounting accuracy of invoices (e.g., dates, amounts, NIP), only their format.
- Errors in invoices can lead to loss of VAT deduction rights for buyers and tax liability for sellers, regardless of intent.
- KSeF is primarily a hub for transmitting and archiving invoices, not for detecting unreliable or fraudulent invoices.
- There are significant tax and criminal penalties for issuing unreliable invoices, and users must ensure invoice accuracy themselves.
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.
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