Knowing Assistance in Australia — the Second Limb of Barnes v Addy
Knowing assistance — the “second limb” of Barnes v Addy (1874) LR 9 Ch App 244 — makes a third party personally liable in equity where they assist a trustee or fiduciary in a dishonest and fraudulent design, with knowledge of that design. Unlike knowing receipt (the first limb), liability does not depend on the third party receiving trust property: it is accessorial.
The Australian doctrine took its modern shape in Consul Development Pty Ltd v DPC Estates Pty Ltd (1975) 132 CLR 373 and was restated by the High Court in Farah Constructions Pty Ltd v Say-Dee Pty Ltd (2007) 230 CLR 89.
Elements of knowing assistance
- A breach of trust or fiduciary duty amounting to a “dishonest and fraudulent design” on the part of the trustee or fiduciary.
- Assistance in that design by the third party.
- Knowledge of the design by the third party, measured against the Baden scale (below).
What knowledge is enough? The Baden categories
Australian law tests the third party’s knowledge against the first four categories of the Baden scale: (1) actual knowledge; (2) wilfully shutting one’s eyes to the obvious; (3) wilfully and recklessly failing to make the inquiries an honest and reasonable person would make; and (4) knowledge of circumstances which would indicate the facts to an honest and reasonable person.
The fifth category — knowledge of circumstances which would merely put an honest and reasonable person on inquiry (constructive notice in the strict conveyancing sense) — is not sufficient. That was the position taken in Consul Development and expressly confirmed by the High Court in Farah v Say-Dee.
Points practitioners commonly miss
- The “dishonest and fraudulent design” must be that of the trustee or fiduciary, assessed by equitable standards — not every breach of fiduciary duty qualifies.
- Farah v Say-Dee also disciplined the first limb: knowing receipt in Australia remains notice-based and is not to be recast as strict-liability restitution.
- Grimaldi v Chameleon Mining (No 2) is the leading intermediate-court survey of both limbs, including the treatment of fiduciaries’ accessories and corporate knowledge.
Key authorities
- Consul Development Pty Ltd v DPC Estates Pty Ltd [1975] HCA 8
High Court of Australia26 February 1975
Consul Development Pty Ltd v DPC Estates Pty Ltd (1975) 132 CLR 373 — the High Court held that constructive notice in the strict sense is not enough for accessory liability; the case anchors the Australian knowledge requirement.
- Farah Constructions Pty Ltd v Say-Dee Pty Ltd [2007] HCA 22
High Court of Australia24 May 2007
Farah Constructions Pty Ltd v Say-Dee Pty Ltd (2007) 230 CLR 89 — restated both limbs of Barnes v Addy, confirmed Baden categories one to four for knowing assistance, and rejected a restitutionary recasting of knowing receipt.
- Grimaldi v Chameleon Mining NL (No 2) [2012] FCAFC 6
Full Court of the Federal Court21 February 2012
Grimaldi v Chameleon Mining NL (No 2) (2012) 200 FCR 296 — the Full Federal Court’s detailed exposition of third-party liability for participation in fiduciary breaches.
Related doctrine guides
This guide was generated by Barrister AI from the primary authorities linked above. It is general information, not legal advice — verify every proposition against the linked judgments before relying on it. Open any case above to read the judgment, or try Barrister AI free to research across the full knowledge graph of Australian legal principles.