# BR-CO-25: add a due date or payment terms

If the invoice amount due is above zero, EN 16931 needs a structured due date or clear payment terms before export.

## What you may see

- Authoritative validation fails with BR-CO-25.
- Amount due for payment (BT-115) is positive.
- Neither Payment due date (BT-9) nor Payment terms (BT-20) is present in the reviewed data.

## Why this blocks export

Recipient systems need to know when a payable invoice is due. Bank details alone do not define a due date, and vague wording on the PDF is not enough unless it is captured as structured payment terms.

## How to fix it

1. If the PDF shows a date such as “payable by 30 June 2026”, enter that date as Due date (BT-9).
2. If the PDF shows wording such as “Net 30 days” or “payable immediately”, enter it as Payment terms (BT-20).
3. If the source invoice has neither, ask the issuer or finance owner for the intended terms before exporting.

## Before you retry

- Run review validation again after editing the field.
- Check that the amount due still matches the invoice total.
- Only download after the review result is current for the edited data.

## Common question

### Is BT-9 always mandatory?
No. The rule becomes blocking when the amount due is positive and neither BT-9 nor BT-20 is present.