`BR-27`

EN 16931 · validation rule

EN 16931Error

An item net price (BT-146) is negative. Prices must be zero or positive; to credit or discount, use a negative quantity, a negative line net amount or an allowance instead.

Field: lines[].price.net (BT-146)
Rule set: EN 16931
Rule-set version: EN 16931 validation artefacts 1.3.17 · in force since 2026-10-13 · Rule-set changelog
Who has to fix it: The sender

This is a property of the file you received, so it cannot be corrected on your side without changing the document — ask the supplier to reissue it.

Check your own invoice

Drop the file that failed. We parse it, run the official rule sets against it and list every finding with a fix — 20 invoices per day, no key, nothing stored.

Open the live demo

Same explanation over the API: GET /v1/rules/BR-27?lang=en