May be accepted e-invoice not pass validation?
Short answer
Really not valid e-invoice (mistake) XSD, EN 16931 or Peppol BIS Billing business rules) normally does not reach the customer at all " network stops it before delivery, at pre-sending or at Access Pointe supplier. If something 'does not pass control' after receipt, it is usually either your own, more stringent internal validation or content mismatch (other goods, price, quantity), not network validation XML.
Validation runs before delivery
XSD, EN 16931 a Peppol BIS Billing is verified on dispatch, not after you already have the document.
Stricter internal rules
If you revalidate the document yourself, you can find a mismatch that the network validation does not test.
This is not a validation
Other goods, price or quantity than the order is a commercial, not technical problem.
Specific reason, not 'not working'
If something really doesn't match, communicate the exact field or item, not the general sense of error.
Conclusion
Network not valid e-invoice does not normally reach the customer at all. If something does not fit after receipt, it is either your own stricter check or the content non-compliance with the order not the failure of technical validation XML.
Sources
- Law No. 222/2004 Z. z. o VAT, § 76a
- EN 16931 validation rules
- Peppol BIS Billing 3.0 Business rules
Not legal advice. Machine-translated answer, not yet manually reviewed. For the exact wording, see the Slovak original.