Cuit Cuil
Detects Cuit Cuil 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
- ar
- Regulations
- PDPL (AR)
- Frameworks
- ISO 27001, ISO 27701
- Data categories
- pii, 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{2}-?\d{8}-?\d{1}\bCorroborative evidence keywords
identifier, number, ID, ID number, identification, ID card, license, permit, registration, certificate
Proximity: 300 characters
Should match
20-12345678-9— Standard CUIT format20123456789— CUIT without separators27-12345678-4— CUIL format (27 prefix)
Should not match
20-1234567-9— Only 7 digits in middle group instead of 8AB-12345678-9— Letters instead of digits in prefix20-12345678-— Missing check digit at end
Known false positives
- Common words and phrases related to cuit cuil appearing in policy documents, training materials, HR templates, or compliance guidelines without actual personal data. Mitigation: Require corroborative evidence keywords within the proximity window to confirm sensitive data context rather than general discussion.
- In Spanish (Argentina), 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.