BR-31 — E-Invoice Validation Rule & Fix

Fixture ID: allowanceEmpty · XPath: /ubl:Invoice/cac:AllowanceCharge[1]/cbc:Amount

1. Why This Rule Triggers (Diagnostic Message)

The document level allowance at allowances[0] has no usable allowance amount (BT-92): you supplied missing. Each BG-20 group must have one, because it is the only figure that actually moves money — the percentage (BT-94) and base amount (BT-93) are documentation of how the figure was reached, not substitutes for it, and BT-107 is the sum of these amounts under BR-CO-11.

2. How to Fix BR-31

Set allowances[0].amount to a positive number of EUR — always positive, even for an allowance: it is the array the entry sits in, not its sign, that decides whether the figure is deducted or added.

3. Valid Code / Payload Example

"allowances": [{ "amount": 25.00, "vatCategory": "S", "vatRate": 19, "reason": "Volume discount" }]