Netherlands Passport Number

Detects Netherlands passport 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

nl, eu

Regulations

BDSG, CNIL / LIL, GDPR

Frameworks

ISO 27001, ISO 27701

Data categories

pii, government-id

Scope

narrow

Risk rating

8

Platform compatibility

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

Pattern

\b[A-Z]{2}[A-Z0-9]{6}\d\b

Corroborative evidence keywords

passport, travel document, passport number, ID number, identification, ID card, license, permit, registration, certificate

Proximity: 300 characters

Should match

• BW1234563 — Two letters, six alphanumeric, trailing digit
• NP9K76543 — Two letters, six alphanumeric, trailing digit
• XBABCDE71 — Two letters, six alphanumeric, trailing digit

Should not match

• 123456789 — All digits with no letter prefix
• A12345678 — Single-letter prefix is invalid for this format

Known false positives

• Generic alphanumeric sequences matching passport format in unrelated contexts. Mitigation: Require corroborative evidence keywords within the proximity window.

References

• Netherlands passport number entity definition - Microsoft Learn