Portugal Tax Identification Number
Detects Portugal Tax Identification Number patterns. This pattern is based on a Microsoft Purview built-in sensitive information type. Due to the numeric format, corroborative evidence keywords are essential for reliable detection.
- Type
- regex
- Engine
- universal
- Confidence
- medium
- Confidence justification
- Medium confidence: nine-digit numbers are common. Portuguese NIF keywords like 'NIF' or 'contribuinte' are required for reliable detection.
- Detection quality
- Verified
- Jurisdictions
- pt, eu
- Regulations
- GDPR
- Data categories
- pii, financial, government-id
- Scope
- narrow
- Risk rating
- 5
- Platform compatibility
- Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Compatible, Netskope: Compatible
Pattern
\b\d{9}\bCorroborative evidence keywords
NIF, número de identificação fiscal, contribuinte, tax identification, finanças, [object Object], tax identification number, tax number, tax return, [object Object], [object Object], tax ID, inland revenue, taxpayer identification, αριθμός φορολογικού μητρώου, ΑΦΜ, φορολογικός, Abgabenkontonummer, adóazonosító, adószám (+21 more)
Proximity: 300 characters
Should match
123456789— Nine-digit Portuguese NIF987654321— Portuguese tax identification number112233445— Portuguese NIF format
Should not match
12345678— Eight digits, too short for Portuguese NIF1234567890— Ten digits, exceeds Portuguese NIF format
Known false positives
- Generic numeric sequences in non-tax contexts such as reference numbers or account identifiers Mitigation: Require corroborative evidence keywords within the proximity window to distinguish tax identifiers from general numeric data.
- Numbers from other identification schemes with similar digit patterns Mitigation: Layer with jurisdiction-specific detection to prioritise matches in tax-related documents and cross-reference with other identifier types.