Correcting Invoice Errors in KSeF: New Rules and Challenges from February 2026

• From February 2026, simple invoice corrections (correction notes) will no longer be valid in KSeF; only the seller can issue a corrective invoice.
• Buyers will be fully dependent on sellers to correct any invoice errors, even minor ones, requiring new communication protocols and increased administrative workload for accounting offices.
• The most common error—incorrect buyer NIP—cannot be simply corrected; instead, a two-step procedure involving a zeroing correction invoice is required.
• The KSeF system’s structure makes it impossible to delete or redirect documents, emphasizing the need for careful data validation before issuing invoices.

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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