Australian Patterns

Allyanonimiser includes specialized patterns for detecting Australian-specific PII and identifiers.

Australian Tax File Number (AU_TFN)

Tax File Numbers are unique identifiers issued by the Australian Taxation Office.

Pattern Example: - 123 456 782 (checksum-valid — use this shape in tests) - TFN: 123 456 782 - TFN on file: 123 456 782, Tax file number as supplied: 123 456 782

A label before the number (TFN, ABN, ACN, CRN, Medicare) decides the type even when the bare digits also fit another identifier. Up to three connective words may sit between the label and the value: is, was, number, no., card, on, file, record, provided, supplied, recorded, listed, given, quoted, as. Words that change the meaning, such as not, break the link.

Regex Pattern:

\b\d{3}\s*\d{3}\s*\d{3}\b

Contexts: "tax", "file", "number", "tfn"

Checksum validation (since v3.2.0): detected TFNs are re-checked against the ATO's modulus-11 weighted algorithm. Numbers that match the regex but fail the checksum — like 123 456 789 — are filtered out. Use 123 456 782 in your own test data.

Australian Phone Number (AU_PHONE)

Australian mobile and landline phone numbers.

Pattern Example: - 0412 345 678 - +61 412 345 678 - (02) 9876 5432

Regex Pattern:

\b(?:\+?61|0)4\d{2}\s*\d{3}\s*\d{3}\b

Contexts: "phone", "mobile", "call", "contact"

Australian Medicare Number (AU_MEDICARE)

Medicare numbers issued by Services Australia. The first digit must be 2–6 and the last digit (the individual reference number, IRN) must be 1–9.

Pattern Example: - 2123 45678 1 (starts with 2, IRN is 1) - 5123 45678 1 - Medicare: 2345 67890 1

Regex Pattern:

\b[2-6]\d{3}\s*\d{5}\s*[1-9]\b

Contexts: "medicare", "card", "health", "insurance"

Validation: detected candidates are re-checked against the format rules (first digit 2–6, IRN 1–9). Numbers like 1234 56789 1 (starts with 1) or 2123 45678 0 (IRN is 0) are filtered out.

Australian Driver's License (AU_DRIVERS_LICENSE)

Driver's license numbers from various Australian states.

Pattern Example: - 12345678 (NSW) - 1234AB (NSW legacy)

Regex Patterns:

\b\d{8}\b
\b\d{4}[a-zA-Z]{2}\b

Contexts: "license", "licence", "driver", "driving"

Australian Address (AU_ADDRESS)

Australian address formats including street addresses and postal codes.

Pattern Example: - 42 Main St, Sydney NSW 2000 - Unit 5, 123 Example Road, Melbourne VIC 3000 - 88 Rundle Mall, Adelaide SA 5000, 7 Hilltop Circuit, Belconnen ACT 2617

The street must end in a recognised Australian street type. The list follows the common Australia Post types, including Mall, Grove, Circuit, Esplanade, Square, Quay, Rise, Walk, Promenade and their abbreviations, as well as Street, Road, Avenue and the other long-standing forms.

Regex Patterns: Multiple complex patterns for detecting address components.

Contexts: "street", "road", "avenue", "address", "suburb"

Australian Postcode (AU_POSTCODE)

Four-digit Australian postcodes.

Pattern Example: - 2000 - 3000 - NSW 2000

Regex Pattern:

\b\d{4}\b

Contexts: "postcode", "post", "code", "postal"

Australian BSB and Account Number (AU_BSB_ACCOUNT)

BSB (Bank-State-Branch) and account number combinations.

Pattern Example: - 123-456 12345678 - 123456 12345678

Regex Pattern:

\b\d{3}-\d{3}\s*\d{6,10}\b

Contexts: "bsb", "account", "banking", "bank"

Australian Business Number (AU_ABN)

Australian Business Numbers issued by the Australian Business Register.

Pattern Example: - 51 824 753 556 (the ATO's published test ABN — checksum-valid) - ABN: 51 824 753 556

Regex Pattern:

\b\d{2}\s*\d{3}\s*\d{3}\s*\d{3}\b

Contexts: "abn", "business", "number", "australian"

Australian Passport Number (AU_PASSPORT)

Australian passport numbers.

Pattern Example: - N1234567 - PA1234567

Regex Pattern:

\b[A-Za-z]\d{8}\b

Contexts: "passport", "travel", "document", "international"

Usage Example

from allyanonimiser import create_allyanonimiser

# Create the analyzer
ally = create_allyanonimiser()

# Example text with Australian PII
text = """
The customer John Smith with TFN 123 456 782 and Medicare 1234 56789 1 
called from 0412 345 678 regarding their policy. They live at 
42 Main St, Sydney NSW 2000 and their ABN is 12 345 678 901.
"""

# Analyze the text
results = ally.analyze(text)

# Filter for Australian patterns only
au_results = [r for r in results if r.entity_type.startswith("AU_")]

# Print the results
for result in au_results:
    print(f"Entity: {result.entity_type}, Text: {result.text}, Score: {result.score}")