Tracing and knowing receipt

Tracing is the process of identifying a claimant's property in its original or substitute form, enabling proprietary claims against mixed funds or their traceable proceeds. It operates through two key presumptions: in Re Hallett, a trustee spending from a mixed account is presumed to spend their own money first, preserving trust funds; in Re Oatway, where a trustee's funds are exhausted, they are presumed to have acted rightfully in preserving trust money in any remaining assets. The rationale is to prevent trustees profiting from breaches while protecting beneficiaries' proprietary interests through substitute assets.

Foskett v McKeown [2001] 1 AC 102: Established that tracing is a process of identification, not a remedy itself - it merely identifies property to which remedies attach. Critical for distinguishing the tracing process from resulting claims. Re Hallett's Estate (1880) 13 Ch D 696: Created the fundamental presumption that a trustee withdrawing from mixed funds spends their own money first. Foundational for all subsequent tracing analysis. Re Oatway [1903] 2 Ch 356: Where trustee's own funds are dissipated, they are presumed to have preserved trust money in remaining assets. Prevents trustees defeating claims through strategic dissipation. BCCI (Overseas) v Akindele [2001] Ch 437: Established 'unconscionability' as the test for knowing receipt - whether defendant's knowledge makes it unconscionable to retain the benefit. Simplified the previously complex Baden categories. Byers v Saudi National Bank [2023] UKSC 51: Clarified that dishonesty is not required for knowing receipt; unconscionable conduct suffices where defendant has relevant knowledge of breach.

Courts apply a two-stage analysis. First, trace the property: identify the original asset, track substitutions through bank accounts or investments, apply Hallett/Oatway presumptions to mixed funds. Document each step meticulously. Second, establish the defendant's liability: for knowing receipt, prove (1) disposal of claimant's assets in breach of trust/fiduciary duty, (2) beneficial receipt by defendant, (3) knowledge making retention unconscionable (not necessarily dishonesty). The knowledge requirement is objective - what would a reasonable person have known? Courts examine timing carefully: knowledge must exist while defendant retains the benefit.

Students conflate tracing (the identification process) with remedies (constructive trust, equitable lien). They misapply Hallett/Oatway - remember Oatway only applies after trustee's own funds are exhausted. Many wrongly require dishonesty for knowing receipt post-Akindele - unconscionability suffices. Students forget tracing's limits: it fails with dissipation into unidentifiable assets or bona fide purchasers without notice.