errorAUTCIUS-AT (Austria)

AT-R-003:Austrian postal code format

Austrian postal codes should be 4 digits.

Severity
Fatal
Rule set
CIUS-AT (Austria)
Country
AUT
Fix type
INPUT REQUIRED

Engine Classification

Business data required · Explicit input workflow · No assumptions made

Required input: Austrian Postal Code

What is AT-R-003?

AT-R-003 is a fatal validation rule defined in the CIUS-AT (Austria) specification (AUT national rules). It validates the PostalZone element under PostalAddress[cac:Country > IdentificationCode="AT"] in the UBL invoice XML.

When this rule fires, the invoice is non-compliant and will be rejected by Peppol access points and national validation services. The sending system receives a rejection response and the invoice does not reach the buyer.

Target path: XPath: //cac:PostalAddress[cac:Country/cbc:IdentificationCode="AT"]/cbc:PostalZone

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Why This Error Matters

Proper postal code ensures delivery.

AT-R-003 is a hard failure. Invoices that trigger this rule are rejected at the access point and never reach the recipient. In Peppol networks, this means your sending system receives an MLR (Message Level Response) with a rejection status. The invoice must be corrected and re-sent, adding delay to your payment cycle.

Validator Behavior

  • ·Causes invoice rejection
  • ·Error returned: AT-R-003
  • ·Specification: CIUS-AT (Austria)

How to Fix It

1.

Check format

Must be exactly 4 digits

2.

Verify code

Valid Austrian PLZ

Before / After

Failing XML
<Invoice>
  <!-- Issue: Austrian postal codes must be 4 digits -->
</Invoice>
Corrected XML
<Invoice>
  <!-- Issue resolved per CIUS-AT (Austria) -->
</Invoice>

Technical Reference

XPathXPath: //cac:PostalAddress[cac:Country/cbc:IdentificationCode="AT"]/cbc:PostalZone
SpecCIUS-AT (Austria)
StrategyRequires user to provide valid 4-digit Austrian postal code

Common Causes

  • ·Wrong digit count
  • ·Invalid PLZ

Seeing this in production? The API handles AT-R-003 automatically. See the fix response →

Frequently Asked Questions

Austrian postal codes should be 4 digits.

Use 4-digit Austrian postal code. Invoice Navigator can help identify and fix this issue.

AT-R-003 is a warning that should be addressed.

Related Errors

AT-R-002

Austrian UID number format invalid

Last updated: 27 February 2026

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