errorbusinessPeppol BIS 3.0

`UBL-SR-07`:Preceding invoice number missing

Fix: This requires user input to resolve. Review the relevant cbc: and cac: elements in your Invoice XML and provide the correct value. (UBL-SR-07). Provide the required value in the free validator.

Your invoice references a previous invoice (via BillingReference) but the actual invoice number is missing. If this invoice replaces or corrects an earlier one, you need to specify which one.

Severity

Fatal

Rule set

Peppol BIS 3.0

Country

All EU

Fix type

INPUT REQUIRED

Confidence

85%

Engine Classification

Business data required · Explicit input workflow · No assumptions made

Required input: Preceding Invoice Number

What is UBL-SR-07?

UBL-SR-07 is a fatal validation rule defined in the Peppol BIS 3.0 specification. It validates the ID element under BillingReference > InvoiceDocumentReference in the UBL invoice XML.

When this rule fires, the invoice is rejected by Peppol access points and never reaches the buyer.

Target path: /Invoice/cac:BillingReference/cac:InvoiceDocumentReference/cbc:ID

Fix this error

Why This Error Matters

Invoice will be rejected. A preceding invoice reference without an invoice number is meaningless and violates EN16931 rules.

UBL-SR-07 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.

Peppol and UBL validators reject invoices that reference a previous invoice without specifying which one. The buyer cannot process a correction or credit note without knowing which original invoice it refers to.

Validator Behavior

·Causes invoice rejection
·Rejected by PEPPOL Access Points
·Error returned: UBL-SR-07
·Specification: Peppol BIS 3.0

How to Fix It

Before / After

Failing XML

<Invoice>
  <!-- Issue: If there is a preceding invoice reference, the preceding inv -->
</Invoice>

Corrected XML

<Invoice>
  <!-- Issue resolved per Peppol BIS 3.0 -->
</Invoice>

Technical Reference

XPath/Invoice/cac:BillingReference/cac:InvoiceDocumentReference/cbc:ID

SpecPeppol BIS 3.0

Operationset_default

StrategyPrompt user for the preceding invoice number referenced in the BillingReference section

Common Causes

·Preceding invoice reference structure added but number field left empty
·Credit note template includes BillingReference but ID not populated
·ERP export created reference element without the required identifier
·Manual editing removed the invoice number from the reference
·Data mapping failed to include the preceding invoice ID

Seeing this in production? The API handles UBL-SR-07 automatically. See the fix response →

Frequently Asked Questions

All amount elements must have currencyID attribute.

This requires user input to resolve. Review the relevant cbc: and cac: elements in your Invoice XML and provide the correct value. (UBL-SR-07). Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.

Yes, UBL-SR-07 is a critical error that will cause invoice rejection. It must be fixed before submission.

Related Errors

BR-CL-04Invalid currency code

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UBL-SR-07:Preceding invoice number missing