Identifying Non-E-Invoice Inputs (PDF/XML)

[Faerballert]

Cheers everyone,

I'm working on a workflow that processes various input formats, including e-invoices in ZUGFeRD or XRechnung format. However, I also receive plain PDFs without embedded XML or XML files that are not (supported e-)invoices at all.

Is there a best practice approach to reliably detect when a file is not an e-invoice?
The idea behind this is that I only want to output a ValidationReport if it has something to do as an e-invoice.

I’d appreciate any insights or experiences you can share!

Best regards

[jstaerk]

For multiple files you can use the metric to find out how many, for individual files you should be able to try/catch (or parse the result string) of a validation for <exception type="17">XML could not be extracted</exception>.

PS: It's not that a plain PDF without attachment can not be an e-invoice, it's just not a structured e-invoice and new nomenclatura seems to ignore unstructured e-invoices.