BR-03: The issue date is missing
This code shows up when an electronic invoice is validated. Here is what it means, why it fires, and what to change in the file.
Why this code appears
No issue date (BT-2). It sets the VAT chargeable event and the starting point of payment terms: an undated invoice is not due.
How to fix it
Fill IssueDateTime/DateTimeString with format 102, that is eight digits YYYYMMDD: 20260901 for 1 September 2026.
Where it happens
This code comes from EN 16931, the European e-invoicing standard. It concerns business term BT-2.