How do I fix PL-R-004?

Obtain valid KSeF session token using certificate or trusted profile. This error involves a protected field — Invoice Navigator flags it in your pipeline so your team can correct it at the source.

Is PL-R-004 a critical error?

Yes, PL-R-004 is a critical error that will cause invoice rejection. It must be fixed before submission.

Error codes · ubl-2.1 · Poland

PL-R-004Partly

KSeF session token invalid

This is the rejection, word for word: „[PL-R-004] KSeF API requires valid authentication token.“

KSeF API authentication

What to have readyThe correct figures from your bookkeeping; we show you which field is affected.

What we doObtain valid KSeF session token using certificate or trusted profile.

Choose the rejected invoiceor drop it here

XRechnung XML or ZUGFeRD PDF. Checking is free · corrected file €1.90 · the first every 30 days is free · no sign-up.

What the finding looks likeExample

FindingNeeds your check · PL-R-004

From youThe correct figures

ThenChecked again

ProofSHA-256 and /verify link after the check

Often appears together with

PL-R-003KSeF submission required