Poland Tax Identification Number

Detects Poland 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: the 3-3-2-2 digit grouping pattern with optional hyphens is somewhat distinctive but can match other formatted numbers. Keywords like 'NIP' improve accuracy.
Detection quality: Verified
Jurisdictions: pl, eu
Regulations: GDPR
Data categories: pii, financial, government-id
Scope: narrow
Risk rating: 7
Platform compatibility: Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Compatible, Netskope: Compatible

Pattern

\b\d{3}-?\d{3}-?\d{2}-?\d{2}\b

Corroborative evidence keywords

NIP, PESEL, numer identyfikacji podatkowej, tax identification, Urząd Skarbowy, TIN, tax identification number, tax number, tax return, IRD, NIF, tax ID, inland revenue, taxpayer identification, αριθμός φορολογικού μητρώου, ΑΦΜ, φορολογικός, Abgabenkontonummer, adóazonosító, adószám (+20 more)

Proximity: 300 characters

Should match

123-456-78-90 — Polish NIP with hyphens
1234567890 — Polish NIP continuous digits
987-654-32-10 — Polish tax ID with separators

Should not match

123-456-78-9 — Only 9 digits, too short for Polish NIP
123-456-789-01 — Wrong grouping for Polish NIP 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.

References

Poland Tax Identification Number entity definition - Microsoft Learn