Australian Deposit Account Reference

Identifies references to Australian consumer deposit account numbers in financial and compliance documents. Uses structural anchors with proximity constraints.

Type: regex
Engine: boost_regex
Confidence: medium
Confidence justification: Medium confidence: structural anchors constrain context but broad field labels can match non-financial identifiers. Corroborative keywords improve precision. Context label evidence plus explicit template/example exclusion improves precision for high-risk identifiers. Added context gating and exclusion rules improve precision and reduce incidental matches.
Jurisdictions: au
Regulations: AML/CTF Act (Cth), IPA 2009 (Qld), NDB Scheme (Cth), Privacy Act 1988 (Cth), SOCI Act 2018 (Cth)
Frameworks: ISO 27001, ISO 27701, PCI-DSS, SOC 2
Data categories: financial
Scope: wide
Risk rating: 8
Platform compatibility: Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Degraded, Netskope: Unsupported

Pattern

(?is)\b(?:deposit\s+account|account\s+(?:number|no\.?|#|ref(?:erence)?)|bank\s+account|savings\s+account|cheque\s+account|transaction\s+account)\b\s{0,80}\b[A-Z0-9][A-Z0-9\-/]{4,24}\b

Corroborative evidence keywords

deposit account, bank account number, BSB, account number, savings account, cheque account, transaction account, direct debit, bank account, account no, routing number, sort code, IBAN, SWIFT, BIC, field, column, row, entry, record (+24 more)

Proximity: 300 characters

Should match

account number A12345678 — Account number anchor with alphanumeric account
deposit account B062000ACC12 — Deposit account anchor followed by financial reference code
bank account X1234-5678/90 — Bank account anchor with identifier containing hyphens and slashes

Should not match

unrelated generic text — No relevant context
number A12345678 — Bare 'number' anchor no longer matches without account context
the quick brown fox — No structural anchor or identifier
reference B062000ACC12 — Bare 'reference' anchor no longer matches without account context

Known false positives

Financial terminology in published reports or textbooks without actual data. Mitigation: Require corroborative keywords in proximity.