What it means
In a UBL invoice or credit note, the seller (BG-4) has a postal address (BG-5) under cac:AccountingSupplierParty/cac:Party/cac:PostalAddress. This rule checks that this address has no cbc:Postbox, a separate element for a PO box number.
Why it matters
The check concerns a separate PO box element, not PO box details written in an address line.
How to fix it
In your invoicing software, enter the PO box as part of the street or address line of the seller address instead of in a separate PO box field, then export again. In the XML this is seller address line 1 (BT-35, cbc:StreetName) or seller address line 2 (BT-36, cbc:AdditionalStreetName). If you build the XML yourself, move the PO box into an address line before deleting cbc:Postbox from cac:PostalAddress in the seller block. Check the corrected file again.
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 AccountingSupplierParty Party PostalAddress Postbox 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-150 still fails, and which other rules do.
Related rules
- UBL-CR-151 Do not include a floor element in the seller's address
- UBL-CR-152 Do not include a room element in the seller's address
- UBL-CR-153 Do not include a separate block name element in the seller's address
- UBL-CR-154 Do not include a separate building name element in the seller's address
- UBL-CR-155 Do not use a separate building number in the seller's address
- UBL-CR-156 Do not include an in-house mail element in the seller's address