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Hungarian real-time invoice reporting · active

Hungary Online Számla

Hungary’s real-time invoice data reporting system with versioned XML schemas and NAV API responses.

InvoiceData XMLAPI request/response XML

Current version and implementation status

Version noteOnline Invoice System 3.0 family; verify current release notes
Statusactive
Reviewed2026-08-02
FamilyHungarian real-time invoice reporting
Open official technical source

How to recognize the profile

Do not rely on the file extension alone. Inspect the root namespace, customization/profile identifiers, version values and authority-specific envelope.

  • invoiceData
  • technicalUser
  • requestSignature
  • NAV response codes

Production validation stack

  1. 1
    XML schema

    Confirm that the document is well formed and structurally compatible with the intended Online Számla syntax.

  2. 2
    Request signatures

    Apply semantic and business-rule checks rather than accepting a file merely because it parses.

  3. 3
    Business rules

    Validate currencies, countries, tax categories, units, payment means and other controlled values against the correct release.

  4. 4
    NAV API response

    Apply the national, network or authority restrictions that narrow the base syntax.

EInvoiceLab’s browser tools provide detection, inspection and technical preflight. A profile is only production-valid after applying the correct official artefacts and obtaining the required network or authority outcome.

Common errors and corrective action

!
Request signature mismatch

Locate the relevant field and rule, correct the source mapping, rerun every validation layer, then preserve the final response.

!
Invalid tax number

Locate the relevant field and rule, correct the source mapping, rerun every validation layer, then preserve the final response.

!
Schema version issue

Locate the relevant field and rule, correct the source mapping, rerun every validation layer, then preserve the final response.

!
NAV business warning/error

Locate the relevant field and rule, correct the source mapping, rerun every validation layer, then preserve the final response.

Countries using or referencing this profile

HUHungaryOnline Számla

Questions people ask

What is Online Számla?

Hungary’s real-time invoice data reporting system with versioned XML schemas and NAV API responses.

How is Online Számla validated?

A production check normally applies XML schema, Request signatures, Business rules, NAV API response. Local browser preflight cannot replace the official validation artefacts or authority outcome.

Which version should I use?

The current research note is: Online Invoice System 3.0 family; verify current release notes. Confirm release notes at the official source before production deployment.

Practical tools

Inspect and prepare Online Számla files

Invoice preflight checker

Tax identifier checker

Check the structure of VAT, GST and national business identifiers.

Open tool
Invoice preflight checker

E-invoice API payload checker

Parse JSON payloads and check common invoice, party, line and total fields before sandbox submission.

Open tool
Implementation

Invoice XML formatter and syntax checker

Format, minify and review well-formed invoice XML locally before deeper profile validation.

Open tool
Invoice preflight checker

Authority and network response decoder

Extract status, identifiers, error codes and messages from common JSON or XML invoice responses.

Open tool