The Trustee for CSS Trust (T/A Christie Systems Services Pty Ltd) is a Carriage service provider (Telephone Service Provider) in Australia (NORTH SYDNEY, NSW), listed in the TIO / ACMA register. The contact details below are reproduced from that register as of 10 September 2026; verify against the live register before serving legal process.
Address requests to the registered address; the major carriers also operate dedicated law-enforcement liaison units reachable through their corporate contacts. For the procedure and legal basis in Australia, see the investigator guides; for platform and app data requests, the LERS portal guides.
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Source: Telecommunications Industry Ombudsman (TIO) public Register of scheme members (Service provider directory), cross-referenced with the ACMA Register of carrier licences (data.gov.au) for carrier licence numbers. Independent reference for study and investigative use; Ministry of Cyber Affairs is not a government body and does not represent The Trustee for CSS Trust (T/A Christie Systems Services Pty Ltd). Names and contact details are reproduced as published by the regulator.