errorHUNnav

HU-R-003:NAV technical user required

NAV reporting requires registered technical user.

Severity
Fatal
Rule set
nav
Country
HUN
Fix type
BLOCKED

Engine Classification

Financial or legal field · Modification blocked by policy

Reason: NAV Online Invoice reporting requires a registered technical user (technikai felhasználó) with valid credentials. Register at onlineszamla.nav.gov.hu and configure the credentials in your invoicing software.

What is HU-R-003?

HU-R-003 is a fatal validation rule defined in the nav specification (HUN national rules). It validates the NAV API authentication element 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: NAV API authentication

This error requires manual correction — financial fields are protected by policy.

Why This Error Matters

Technical user enables API access.

HU-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: HU-R-003
  • ·Specification: nav

How to Fix It

1.

Register user

In NAV Online Invoice portal

2.

Get credentials

API key and technical user

3.

Configure system

Set up API connection

XML Example

Generic example based on the rule's target XPath. Your actual XML structure may differ.

Before
<!-- Triggers validation error -->
<NAV API authentication></NAV API authentication>
After
<!-- Corrected -->
<NAV API authentication>VALID_VALUE</NAV API authentication>

Technical Reference

XPathNAV API authentication
Specnav

Common Causes

  • ·No technical user
  • ·Invalid credentials

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

Frequently Asked Questions

NAV reporting requires registered technical user.

Register technical user in NAV Online Invoice. Invoice Navigator can help identify and fix this issue.

Yes, HU-R-003 is a critical error that must be fixed.

Related Errors

HU-R-002

NAV Online Invoice reporting required

Last updated: 27 February 2026

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