Karta tal-Identità

Detects Karta tal-Identità patterns. This pattern is based on a Microsoft Purview built-in sensitive information type. Users already running Purview may prefer to enable the built-in SIT directly, or use this version as a starting point for customisation.

Type: regex
Engine: universal
Confidence: medium
Confidence justification: Medium confidence: pattern has structural constraints but corroborative keywords are recommended to reduce false positive rates. Added context gating and exclusion rules improve precision and reduce incidental matches.
Detection quality: Verified
Jurisdictions: eu, mt
Regulations: BDSG, CNIL / LIL, GDPR
Frameworks: ISO 27001, ISO 27701
Data categories: pii, government-id
Scope: narrow
Risk rating: 9
Platform compatibility: Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Compatible, Netskope: Compatible

Pattern

\b\d{7}[A-Z]\b

Corroborative evidence keywords

identity card, karta tal-identità, ID card, ID number, identification, license, permit, registration, certificate, field, column, row, entry, record, value, form, register, database, extract, export (+18 more)

Proximity: 300 characters

Should match

1234567A — Maltese ID card with check letter
9876543M — Another Maltese ID card
4567890Z — Valid format Maltese ID

Should not match

123456A — Too few digits (6)
12345678A — Too many digits (8)
template example placeholder record identifier — Template/sample context should be excluded even when anchor words are present

Known false positives

Seven digits followed by an uppercase letter may match some reference codes or serial numbers. Mitigation: Require corroborative evidence keywords such as "identity card" or "karta tal-identità" within the proximity window.
In multiple languages, similar terminology used in formal or administrative contexts (education, professional documentation) that does not constitute sensitive data collection. Mitigation: Layer with additional contextual signals such as structured identifiers, form fields, or database column headers to distinguish sensitive records from general references.

References

Malta Identity Card Number entity definition - Microsoft Learn