# BR-12

Quoted from a public specification. This page is not a validator, and it is not tax, legal, or accounting advice.

- Country: EU
- Syntax: UBL
- Severity: fatal
- Statement language: en
- Last verified: 2026-10-18

## Official statement

> An Invoice shall have the Sum of Invoice line net amount (BT-106).

Source: https://docs.peppol.eu/poacc/billing/3.0/rules/ubl-tc434/BR-12/

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.

## Plain-language reading

An invoice must have the sum of invoice line net amount (BT-106). The message says "shall have the". The published test checks that cbc:LineExtensionAmount exists. It does not calculate that amount. The context is the legal monetary total.

## What to change

Add cbc:LineExtensionAmount on the legal monetary total. That element is the sum of invoice line net amount (BT-106).

## Illustration

Illustration of the condition in the official statement. Not an example published by the source.

**Fails the stated condition.** The legal monetary total has no line extension amount.

**Passes the stated condition.** The legal monetary total has a line extension amount element.

## Published context and test

Copied from the source. Not reimplemented on this page.

```
cac:LegalMonetaryTotal
```

```
exists(cbc:LineExtensionAmount)
```

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