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Fatal

UBL-SR-11: An invoice can have only one seller company registration number

In short

Fatal: fails the selected checks.

UBL-SR-11 means the invoice gives the seller more than one company registration number (BT-30). Keep the single number under which your company is entered in the register and remove the rest.

On this page

What it means

The seller's company registration number (BT-30) identifies the seller's legal entity in a business register, such as a KvK number, a SIRET number or a Companies House number. In UBL it is cbc:CompanyID inside the seller's cac:PartyLegalEntity. The rule counts those elements and allows one.

Why it matters

EN 16931 allows at most one seller company registration number per invoice or credit note.

How to fix it

Check the seller or company settings in your invoicing software for fields such as company number, chamber of commerce number or registration number, and make sure only one of them is exported as the registration number. Do not put your VAT number or tax number here, they have their own fields. Other legal details can go in the seller's additional legal information (BT-33). In the XML, keep one cbc:CompanyID in cac:AccountingSupplierParty/cac:Party/cac:PartyLegalEntity.

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

Seller legal registration identifier shall occur maximum once

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
Rule text from phive-rules 4.6.4.

Check your file

Drop your e-invoice to see whether UBL-SR-11 still fails, and which other rules do.

Updated 6 November 2026