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wFirma

wFirma

Używasz wFirma? Waliduj faktury dla KSeF. Freelancer, przygotuj się do obowiązku 2026.

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Supported E-Invoice Formats

FormatSupport Level
KSeF FA(2)Native Support

Common Validation Errors

These errors are frequently encountered when validating e-invoices from wFirma. Click on any error to see the fix.

KSEF-001Common

KSeF NIP validation failed — bad format or wrong identifier field

Freelancers invoicing consumers don't need NIP, but B2B clients must have valid NIP.

View fix
KSEF-009Occasional

Bank account not on VAT white list

Split payment mechanism requires verified bank account on VAT white list (biała lista).

View fix

About wFirma

wFirma to popularna platforma księgowa online dla jednoosobowej działalności i freelancerów. Integracja KSeF w chmurze.

Validate Your Invoice

Export your invoice from wFirma and validate it against Peppol and EN16931 rules.

Validate Free

How to Validate

  1. 1Export your invoice as UBL or XML from wFirma
  2. 2Upload the file to our validator
  3. 3Review errors and warnings with suggested fixes
  4. 4Fix issues in wFirma and re-export

Resources

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