What it means
The referenced purchase order line (BT-132) is the line number on the buyer's purchase order that an invoice line relates to. Each line may give it only once, in cac:OrderLineReference/cbc:LineID.
Why it matters
The buyer's system can use the purchase order number and the order line number to match each invoice line to what was ordered.
How to fix it
If one invoice line really covers several order lines, split it into one invoice line for each order line, each with its own order line number. Otherwise remove the extra reference in your invoicing software. In the XML, each line may contain at most one cac:OrderLineReference/cbc:LineID.
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
Referenced purchase order line 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 |
Check your file
Drop your e-invoice to see whether UBL-SR-35 still fails, and which other rules do.
Related rules
- UBL-SR-36 A line can have only one invoice line period
- UBL-SR-37 A line can have only one price discount
- UBL-SR-39 An invoice can have only one project reference
- UBL-SR-40 The buyer can have only one trade name
- UBL-SR-42 A seller can have at most two tax scheme entries
- UBL-SR-43 Only the invoiced object reference may carry a scheme identifier