Error Guide

🇦🇹 AT-01: Austrian sellers should include UID number in Austria

WarningB2G MandatoryManual Fix

Austrian sellers should include UID number. This validation rule ensures Invoice compliance with CIUS-AT (Austria).

Quick Facts

Severity

Warning

Ruleset

CIUS-AT (Austria)

Mandate

B2G Only

Fix Type

Manual

Why This Matters in Austria

Austria requires (B2G) e-invoicing using ebInterface 6.0, Peppol BIS Billing 3.0. This warning may cause processing delays in Austria. While not immediately rejected, it should be fixed for compliance.

How to Fix AT-01

Review your Invoice XML structure and correct the issue described by this rule. Check relevant cbc: and cac: elements per CIUS-AT (Austria).

Example: Before & After

Before (invalid)

<Invoice>
  <!-- Issue: Austrian sellers should include UID number -->
</Invoice>

After (fixed)

<Invoice>
  <!-- Issue resolved per CIUS-AT (Austria) -->
</Invoice>

Austria E-Invoicing Requirements

Phase

Status

Scope

B2G

Live (Jan 2014)

All federal government suppliers

B2B mandate

2027-2028

Expected under ViDA

Fix AT-01 automatically

Upload your invoice and let Invoice Navigator auto-remediate this error.

Try the Validator Austria Guide →