Australian Property Title Reference (Lot/Plan)

Detects Australian property title and plan references used across state and territory land-title systems, including Lot/DP, Lot/SP, Lot/PS, Lot/LP, Lot/CP, title references, and folio identifiers. Requires land-registry context for enforcing tiers.

Type

regex

Engine

universal

Confidence

low

Confidence justification

Low confidence: the generic digits/digits format matches many non-property references such as date fractions, version numbers, and ratios. Corroborative evidence keywords such as property, title, lot, or DP are essential for reliable detection.

Detection quality

Partial

Jurisdictions

au

Regulations

AML/CTF Act (Cth), HRIPA (Cth), IPA 2009 (Qld), My Health Records Act 2012 (Cth), NDB Scheme (Cth), Privacy Act 1988 (Cth), TIA Act 1979 (Cth)

Frameworks

ISO 27001, ISO 27701

Data categories

location, pii

Scope

wide

Risk rating

4

Platform compatibility

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

Pattern

(?i)\b(?:Lot|LOT)\s+\d+(?:/|\s+on\s+)(?:DP|SP|PS|LP|CP)\s*\d{3,7}\b

Corroborative evidence keywords

property, title reference, lot, deposited plan, DP, strata plan, SP, real property, address, age, birthday, citizenship, city, date of birth, [object Object], email, ethnicity, fax, first name, full name (+55 more)

Proximity: 500 characters

Should match

• 1/12345 — Low-tier probe - generic lot/plan candidate without registry context
• 23/1234567 — Lot 23 in larger DP
• 100/99999 — High lot number in DP
• NSW Land Registry title: 12/DP123456 — Bare lot-on-plan form with land-registry context (wired Pattern_property_lot_plan 75 tier)
• Lot 7/SP98765 on strata title, NSW — High-tier probe - labelled lot/plan with registry and state context

Should not match

• 1/1234 — Only 4 digits after slash (below minimum of 5)
• 1/12345678 — 8 digits after slash (above maximum of 7)
• 1-12345 — Hyphen separator instead of forward slash
• Invoice 12/DP123456 was cancelled. — Lot-plan-shaped token in invoice context without land-registry evidence must not fire the 75 tier
• The subdivision plan is under review. — Property topic without an identifier
• Documentation example: NSW land title Lot 7/SP98765 — Structurally complete but explicitly documented example

Known false positives

• Australian property-title and lot/plan terminology appearing in policy documents, templates, or land-registry guidance without a specific live parcel record. Mitigation: Require corroborative evidence keywords within the proximity window to confirm sensitive data context rather than general discussion.
• In Australian English, 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.
• High-frequency pattern matches in large document corpora due to broad regex anchors. Expected match rate is significantly higher than specific identifier patterns. Mitigation: Tune confidence thresholds for bulk scanning. Consider using this pattern primarily as a pre-filter with secondary validation.