- The Ministry of Finance published a guide on using the National e-Invoice System (KSeF) starting February 1, 2026.
- The guide explains the rules for issuing and receiving invoices under the new legal framework.
- Invoices in KSeF will be structured and issued in XML format with a unique KSeF number.
- Electronic invoices differ from structured invoices and do not require KSeF.
- Only structured invoices will be issued in KSeF, excluding other document types.
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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