PT-R-001:Portuguese NIF required
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 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: XPath: //cac:PartyTaxScheme/cbc:CompanyID
Why This Error Matters
NIF required for Portuguese tax compliance.
PT-R-001 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
- ·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. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
Yes, PT-R-001 is a critical error that will cause invoice rejection. It must be fixed before submission.
Related Errors
Last updated: 27 February 2026
Handle PT-R-001 Automatically in Your Pipeline
The compliance engine auto-remediates this error with controlled safety policies and evidence pack generation.