Counterfoil rule note
Quoted from a public specification. This page is not a validator, and it is not tax, legal, or accounting advice.
Item price discount shall occur maximum once
Source: https://docs.peppol.eu/poacc/billing/3.0/rules/ubl-tc434/UBL-SR-37/
Peppol BIS Billing 3.0, May 2026 release, EN 16931 model bound to UBL
Severity note: fatal, from the Flag column of the Peppol BIS Billing 3.0 UBL rules index retrieved 2026-10-18.
The item price discount shall occur at most once. The statement has no period and says shall. It is 44 characters. It says discount. The flag is fatal. The context is an invoice line or a credit note line. The published test counts cac:Price/cac:AllowanceCharge/cbc:Amount. The count comparison has a space before <= and a space after it.
On an invoice line or a credit note line, send at most one item price discount.
Illustration of the condition in the official statement. Not an example published by the source.
Fails the stated condition. An invoice line has two item price discounts.
Passes the stated condition. An invoice line has one item price discount, or none.
Copied from the source. Not reimplemented on this page.
cac:InvoiceLine | cac:CreditNoteLine
(count(cac:Price/cac:AllowanceCharge/cbc:Amount) <= 1)
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