Estonia Driver's License Number

Detects Estonia driver's license number 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.

Detection quality

Verified

Jurisdictions

ee, eu

Regulations

BDSG, CNIL / LIL, GDPR

Frameworks

ISO 27001, ISO 27701

Data categories

pii, government-id

Scope

narrow

Risk rating

6

Platform compatibility

Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Compatible, Netskope: Compatible

Pattern

\b[A-Z]{2}\d{6}\b

Corroborative evidence keywords

driver, licence, license, driving, DL, ID number, identification, ID card, permit, registration, certificate

Proximity: 300 characters

Should match

• ET123456 — Standard Estonian driver's license with 2 letters and 6 digits
• AB987654 — Another valid format with different letter prefix
• XY000123 — Valid format with leading zeros in digit portion

Should not match

• E1234567 — Only 1 letter instead of required 2
• ETA12345 — 3 letters instead of required 2

Known false positives

• Generic numeric sequences matching the driver's license format appearing in unrelated contexts. Mitigation: Require corroborative evidence keywords within the proximity window to confirm driver's license context.

References

• Estonia driver's license number entity definition - Microsoft Learn