HU-R-001:Hungarian tax number required
Fix: Add HU + tax number (8+1+2 digits). Provide the required value in the free validator.
Hungarian invoices must include adószám (tax number).
Engine Classification
Business data required · Explicit input workflow · No assumptions made
Required input: Hungarian Tax Number (Adószám)
What is HU-R-001?
HU-R-001 is a fatal validation rule defined in the nav specification (HUN national rules). It validates the CompanyID element under PartyTaxScheme 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:PartyTaxScheme/cbc:CompanyID
Why This Error Matters
Hungarian tax identification required.
HU-R-001 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: HU-R-001
- ·Specification: nav
How to Fix It
Get tax number
11-digit Hungarian tax number
Add to invoice
HU prefix + number
XML Example
Generic example based on the rule's target XPath. Your actual XML structure may differ.
<!-- Missing or empty element triggers cbc:CompanyID error --> <cbc:CompanyID></cbc:CompanyID>
<!-- Provide the required value --> <cbc:CompanyID>VALID_VALUE</cbc:CompanyID>
Technical Reference
XPath: //cac:PartyTaxScheme/cbc:CompanyIDCommon Causes
- ·Missing tax number
- ·Wrong format
Seeing this in production? The API handles HU-R-001 automatically. See the fix response →
Frequently Asked Questions
Hungarian invoices must include adószám (tax number).
Add HU + tax number (8+1+2 digits). Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.
Yes, HU-R-001 is a critical error that must be fixed.
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Last updated: 3 March 2026
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