KSEF-010
Error Guide
🇵🇱 KSEF-010: KSeF XML schema validation failed in Poland
ErrorMandatoryManual Fix
Invoice XML must conform exactly to the FA schema version (FA/1 or FA/2). Even minor deviations cause rejection.
Quick Facts
Severity
Error (rejection)
Ruleset
KSeF
Mandate
B2B Mandatory
Fix Type
Manual
Why This Matters in Poland
Poland requires e-invoicing using KSeF XML format. Invoices with this error will be rejected. They cannot be processed for Poland compliance.
Invoice Navigator covers 134 KSeF FA(2) rules for Poland. Auto-remediates 78% of top rejection errors.
How to Fix KSEF-010
Poland E-Invoicing Requirements
Phase
Status
Scope
KSeF voluntary
Live (Jan 2022)
All VAT payers (opt-in)
B2B mandatory
Live (Feb 2026)
All Polish VAT payers
B2G
Live (Feb 2026)
Included in general KSeF mandate
Common Causes
- •Missing required elements
- •Invalid element order
- •Software not updated to latest schema
Fix KSEF-010 automatically
Upload your invoice and let Invoice Navigator auto-remediate this error.