PT-R-001:Portuguese NIF required
Fix: Add 9-digit Portuguese NIF with PT prefix. Provide the required value in the free validator.
Portuguese invoices must include NIF (Numero de Identificacao Fiscal).
Engine Classification
Business data required · Explicit input workflow · No assumptions made
Required input: Portuguese NIF
What is PT-R-001?
PT-R-001 is a fatal validation rule defined in the ubl-2.1 specification (PRT 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
NIF required for Portuguese tax compliance.
PT-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
- ·Fails UBL schema validation
- ·Error returned: PT-R-001
- ·Specification: ubl-2.1
How to Fix It
Get NIF
9-digit tax number
Add to invoice
PT + 9 digits in CompanyID
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 seller NIF
- ·Invalid NIF format
Seeing this in production? The API handles PT-R-001 automatically. See the fix response →
Frequently Asked Questions
Portuguese invoices must include NIF (Numero de Identificacao Fiscal).
Add 9-digit Portuguese NIF with PT prefix. Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.
Yes, PT-R-001 is a critical error that will cause invoice rejection. It must be fixed before submission.
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Last updated: 3 March 2026
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