- The worst-case scenario for KSeF did not occur, but the real test will come in April when the entire market joins.
- Some formally correct invoices are not reaching KSeF, despite passing all local validations and appearing correct in ERP systems.
- The main cause is technical: certain XML files are encoded with UTF-8 with BOM, which KSeF may reject, even though most validation engines accept them.
- These “silent failures” are hard to detect and can disrupt accounting and reporting processes before the issue is diagnosed.
- The diversity of invoicing streams and technical details like file encoding are critical challenges for successful KSeF implementation.
Source: crido.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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