errorcountryAUTCIUS-AT (Austria)

AT-R-003:Austrian postal code format

Fix: This requires user input to resolve. Review the relevant cbc: and cac: elements in your Invoice XML and provide the correct value. (AT-R-003). Provide the required value in the free validator.

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 rejected by Peppol access points and never reaches the buyer.

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

Fix this error

Why This Error Matters

Proper postal code ensures delivery.

AT-R-003 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.

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.

This requires user input to resolve. Review the relevant cbc: and cac: elements in your Invoice XML and provide the correct value. (AT-R-003). Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.

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

Related Errors

AT-R-002Austrian UID number format invalid

Related Content

Errors
Austrian sellers should include UID numberAustrian UID number format invalid
Answers
What are the differences between e-invoice formats?Which EU countries have e-invoicing mandates and what are the deadlines?

Last updated: 3 March 2026

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