What it means
Each line carries a VAT category code (BT-151), such as S for the standard rate or E for exempt from VAT. In UBL it is cbc:ID inside cac:ClassifiedTaxCategory in the item of the line. The code list is fixed by the standard, so the code is written with no scheme. This rule checks that no cac:ClassifiedTaxCategory/cbc:ID has a schemeID attribute.
Why it matters
This is a warning. If your export adds the attribute to every line, the warning applies to the whole invoice, which is a good reason to fix it at the source.
How to fix it
Export again in the standard EN 16931, XRechnung or Peppol BIS format, and update the software or ask its support if the attribute is still there. If you build the XML yourself, delete the schemeID attribute from cbc:ID in every cac:ClassifiedTaxCategory.
Once the file is corrected, check it again for free: Validate an invoice against EN 16931
Or fix the invoice in a form and download the corrected file, for 1 credit: Fix a rejected e-invoice
The rule as published
A UBL invoice should not include the ClassifiedTaxCategory/ID schemeID Where this rule applies
| Rule set | Version |
|---|---|
| EN 16931 (UBL) | 1.3.17 |
| EN 16931 (UBL credit note) | 1.3.17 |
| XRechnung 3.0 (UBL) | 3.0.2 |
| XRechnung 3.0 (UBL credit note) | 3.0.2 |
| Peppol BIS Billing 3.0 (invoice) | 2026.5 |
| Peppol BIS Billing 3.0 (credit note) | 2026.5 |
| SI-UBL 2.0 / NLCIUS (invoice) | 2.0.3.13 |
| SI-UBL 2.0 / NLCIUS (credit note) | 2.0.3.13 |
| France CTC (UBL invoice) | 1.4.0-04 |
| France CTC (UBL credit note) | 1.4.0-04 |
| CIUS-RO UBL Invoice 1.0.9 | 1.0.9 |
| CIUS-RO UBL Credit Note 1.0.9 | 1.0.9 |
Check your file
Drop your e-invoice to see whether UBL-CR-679 still fails, and which other rules do.
Related rules
- UBL-CR-680 Do not add a payer account directly to the payment instructions
- UBL-CR-681 Do not add an instruction note to the payment instructions
- UBL-CR-682 The delivery address must sit inside the delivery location
- UBL-CR-678 The VAT category code must have no scheme
- UBL-CR-677 The account to be debited must not have a scheme attribute
- UBL-CR-676 The direct debit mandate reference must not have a scheme