PEPPOL UBL is stricter than a regular PDF. Even an invoice that looks correct can miss an identifier, address, or amount in the structured data.
Most common missing data
Typical blocking issues include missing company ID, VAT ID, tax ID, IBAN, supplier or customer address, currency, delivery date, issue date, invoice line, or rounding mismatch.
For Slovak invoicing, it is practical to fix the company profile and customer directory first. The same data then helps future invoices too.
What happens after fixing data
When you fix an invoice draft and save it, OnlineOffice creates current outputs: PDF, archive XML, and PEPPOL UBL if validation rules pass.
If you fix only the company or customer in the directory, open the concrete invoice and save it. That creates outputs from the latest data.
When not to create a new document
For a draft, it is safe to fix data and save again. For issued, sent, or accounting-locked invoices, follow internal rules, audit trail, and accountant guidance.
The goal is that data fixes do not break numbering, history, or legal document retention.
FAQ
Is Missing data an app error?
Not always. Usually it means the structured eInvoice output needs a required field that may not be obvious from the PDF preview.
Why do I see PDF and XML but not UBL?
PDF and archive XML can exist even when PEPPOL UBL does not pass validation yet. After completing missing data, save the draft again.
Is why an einvoice says missing data legal or accounting advice?
No. OnlineOffice provides working tools and materials. Important outputs should be reviewed against the specific situation.