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Warning

UBL-CR-637: A discount sequence number does not belong inside the line price

In short

Warning: worth checking.

UBL-CR-637 means a cac:AllowanceCharge block inside an invoice or credit note line's price contains a sequence number (cbc:SequenceNumeric). Remove that element from the block, then export and recheck the file.

On this page

What it means

The rule checks every cac:Price/cac:AllowanceCharge on invoice and credit note lines for cbc:SequenceNumeric. It checks the element's presence, not its value or the number of discounts. The price discount amount (BT-147) and price before the discount (BT-148) are separate fields.

Why it matters

EN 16931 does not define a sequence number within a price discount.

How to fix it

Remove cbc:SequenceNumeric from cac:AllowanceCharge inside cac:Price in each affected cac:InvoiceLine or cac:CreditNoteLine. Keep the correct price discount amount (BT-147) and price before the discount (BT-148). Export the corrected file and recheck it.

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 InvoiceLine Item Price AllowanceCharge SequenceNumeric

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-CR-637 still fails, and which other rules do.

Updated 6 November 2026