How do I fix XML-004?

Remove or encode invalid characters. This error involves a protected field — Invoice Navigator flags it in your pipeline so your team can correct it at the source.

Is XML-004 a critical error?

Yes, XML-004 is a critical error that must be fixed.

Error codes · ubl-2.1

XML-004Partly

Invalid XML characters

This is the rejection, word for word: „[XML-004] Document contains invalid XML characters.“

Character validation

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

What we doRemove or encode invalid characters.

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 · XML-004

From youThe correct figures

ThenChecked again

ProofSHA-256 and /verify link after the check

Often appears together with

XML-002Malformed XML structure