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Module 12 · Tracing, proprietary remedies and defences
What this module covers and why it matters. This module covers how a plaintiff follows misapplied trust value into whatever it became, and what remedies and defences turn on the result. Tracing lets equity say the money in this account, or the asset the trustee bought, still answers for the trust. It is the heaviest module in the subject because it is the ending of almost every story that begins with a breach or a knowing recipient, and it decides the fight that matters most in practice, which is whether the plaintiff beats the trustee's ordinary creditors to the property. It pulls Modules 6 and 11 into a final proprietary conclusion.
How to use this guide. The scaffold below is the running order. The mixing scenarios table near the end is the spine and every rule feeds into it, so learn the table and use it to place any set of facts. Work every claim to a dollar figure and a chosen remedy, because a trace that is never priced leaves the marks on the table.
Cases at a glance
| Case | In a line |
|---|---|
| Foskett v McKeown | Tracing identifies the value of misapplied property in a substitute asset; the beneficiary claims a proportionate share, not traced title |
| In re Hallett's Estate | Where a trustee mixes trust money with their own and withdraws, they are presumed to spend their own money first |
| Re Oatway | Where a surviving asset was bought before the balance was dissipated, the beneficiary may elect to take the asset |
| Scott v Scott | Mixed funds in an appreciating asset yield a proportionate share of the profit, securable by an equitable lien; losses shared pro rata |
| Lofts v MacDonald | The lowest intermediate balance rule: later deposits do not replenish trust money already spent |
| Re French Caledonia Travel | Between innocent claimants, Clayton's Case is displaced by pari passu or a rolling charge |
| Re Diplock | Innocent volunteer mixing is shared pari passu; improvements to the volunteer's land are likely untraceable |
| Boscawen v Bajwa | Trust money that discharges a secured debt may give the claimant subrogation to the security |
The analytical scaffold
Tracing problems reward a fixed order that moves from personal remedies, through the trace, through the mixing rules, to the defences.
- State the personal remedies in short. Equitable compensation for loss, restoration of the misapplied fund, and an account of profits. These survive where the property is gone.
- Ask whether the plaintiff can trace. Equitable tracing needs an initial fiduciary relationship and follows value into substitutes rather than following the same asset into new hands.
- Apply the rules for the trustee's own money mixed with trust money. Hallett, Oatway and Scott, which resolve into an election in the beneficiary's favour.
- Fix the lowest intermediate balance. The claim cannot exceed the lowest point the fund fell to, and later deposits do not replenish.
- Resolve mixing with another innocent claimant. Clayton's Case is displaced by pari passu sharing or a rolling charge.
- Resolve mixing by an innocent volunteer. Pari passu, and improvements to the land are likely untraceable.
- Handle payment of debts. An unsecured debt is dissipation, but subrogation may revive a discharged security.
- Share depreciation pro rata, just as profit is shared pro rata.
- Choose a remedy from the menu and test the defences.
Having set the order we take each stage in turn, beginning with the personal remedies.
Personal remedies
What this section covers and why it matters. Before tracing you note the personal claims, because they are the fallback when the property has gone.
Personal liability survives dissipation. Once the property is spent on something that leaves no asset behind, only the personal claim remains. Detail is cross-linked to the Remedies subject bank.
Can the plaintiff trace
What this section covers and why it matters. Tracing is often described loosely. The examiner rewards a clean distinction between following and tracing and a clear statement of the fiduciary gateway.
Hold the distinction. Following keeps its eye on one physical thing as it moves between people. Tracing fixes instead on the value inside whatever the money was turned into. Foskett adds that the beneficiary does not trace title but claims the value, taking a proportionate share of the substitute asset. That proportionate share is the engine of every mixing rule below.
Mixing with the trustee's own money
What this section covers and why it matters. The commonest scenario is a trustee who runs trust money through an account that also holds their own money and then spends. Three rules resolve it, and together they hand the beneficiary a favourable election.
Start with the presumption about the order of spending.
The presumption is a twist because it works against the wrongdoer. You cannot know whose dollar left the account, but equity resolves the doubt against the trustee who created it and treats the trustee's own money as spent first, keeping the trust money in the account for the beneficiary.
Now take the trustee who spends first and dissipates later.
Read Hallett and Oatway together and they resolve into an election in the beneficiary's favour. Where the balance in the account has been dissipated and only the purchased asset survives, the beneficiary is not confined to a proportionate slice. The beneficiary may attribute the trust money in full to the surviving asset and take it, because the trustee cannot say the survivor was bought with their own money (Re Oatway). Where trust money still survives in the account alongside the asset, the beneficiary shares proportionately rather than taking the whole.
Worked example. A trustee holds an account with two thousand dollars of her own money. She pays in ten thousand dollars of trust money, withdraws ten thousand and buys shares that later double in value, then spends the remaining two thousand on a dinner that leaves nothing behind. The balance is dissipated and only the shares survive. Under Oatway the beneficiary may attribute the trust money in full to the shares and take them, so the beneficiary elects to take the shares and captures the whole rise. Had trust money still survived in the account beside the shares, the claim would have been a proportionate share under Scott instead.
Consolidation. Hallett keeps trust money in the account, Oatway lets the beneficiary claim a surviving asset in full where the balance is gone, and Scott gives a proportionate share where trust value survives alongside. Read as one, they let the beneficiary choose the outcome that recovers most.
Lowest intermediate balance
What this section covers and why it matters. The mixing rules have a ceiling. This section fixes it, because it caps the proprietary claim and defeats a wrong argument about later deposits.
The trap is the later deposit. A lottery win or inheritance paid into the depleted account is the trustee's own money and does not restore the trust money already spent. Fix the lowest point the account fell to after the mixing and cap the claim there. If the account dropped to fifty dollars before any later deposit, the proprietary claim is fifty dollars whatever went in afterwards.
Mixing with another innocent claimant
What this section covers and why it matters. Where the fund holds trust money from two innocent sources rather than the trustee's own money, a different rule shares it out.
Name Clayton's Case, the first in first out rule, then displace it. Pari passu shares by contribution and suits a simple mix. The rolling charge tracks the order of dealings and is more accurate where dealings interleave.
Innocent volunteer mixing and improvements
What this section covers and why it matters. Where the trustee has paid trust money to an innocent volunteer who then mixes it, neither party is at fault and equity shares the fund. It also fixes the limit on tracing into improvements.
The improvements point is a recurring trap: money spent improving the volunteer's land is likely untraceable. A depreciating asset bought with mixed funds is shared pro rata in the loss, just as an appreciating asset is shared pro rata in the profit.
Payment of debts: dissipation and subrogation
What this section covers and why it matters. Using trust money to pay a debt looks traceable and usually is not. The line between an unsecured and a secured debt leads to opposite results.
When trust money pays an unsecured debt the money buys nothing, so the trace ends and the plaintiff is left with a personal claim in knowing receipt under Module 11.
A secured debt is different. When trust money pays off a mortgage, equity can keep the discharged security alive by subrogation, so the plaintiff steps into the lender's shoes and takes the benefit of the charge. This is the sophisticated alternative to treating the payment as pure dissipation.
Worked example. A favoured relative receives five thousand dollars of trust money and pays off his credit card. The card is an unsecured debt, so the payment is dissipation and there is nothing to trace into, and the plaintiff pivots to a personal claim in knowing receipt under Module 11. Change the debt. Suppose the money paid down the mortgage over his house. The debt was secured, so the plaintiff may be subrogated to the discharged mortgage and take a charge over the house for the amount paid (Boscawen).
Consolidation. Paying a debt is the fork in the road. An unsecured debt is dissipation and sends you to a personal claim. A secured debt opens subrogation and preserves a proprietary result.
The remedies menu and the defences
What this section covers and why it matters. Once the trace lands you choose a remedy and test the defences that can still defeat a proprietary claim.
The election wins the marks on an appreciating asset. Take the asset, take a constructive trust over it, or take an account of profits secured by a lien, and choose by which yields most on the facts.
The bona fide purchaser for value without notice takes free of the claim. The innocent volunteer does not and surrenders traceable property regardless of knowledge, though knowledge decides personal liability once the property is gone. A charity that buys or improves premises with trust money invites the change of position and inequitable to trace defences.
Mixing scenarios mapped
This table is the centrepiece. Place any facts against it, apply the matching rule and price the claim.
| Scenario | Rule | Authority |
|---|---|---|
| Trustee mixes own money, then withdraws | Presumed to spend own money first | Hallett |
| Trustee buys a surviving asset, dissipates the rest | Beneficiary elects to take the asset | Oatway |
| Mixed funds buy an appreciating asset | Proportionate share of the profit; lien | Scott |
| Account depleted then topped up | Lowest intermediate balance; no replenishment | Lofts v MacDonald; Roscoe v Winder |
| Two innocent claimants mixed | Pari passu or rolling charge, not Clayton | Re French Caledonia; Caron v Jahani (No 2) |
| Innocent volunteer mixes | Pari passu; improvements untraceable | Re Diplock cf Foskett |
| Unsecured debt paid | Dissipation; personal claim only | Re Diplock |
| Secured debt paid | Subrogation to the security | Boscawen |
Consolidation. Every mixing problem reduces to one of these rows. Find the row, apply the rule, fix the ceiling with the lowest intermediate balance, choose the remedy that recovers most, then test the defences.
How the examiners test this
Tracing runs two or three times in a single paper because it is the ending of every story, so the marks reward volume of clean application. Budget the words for it and conclude each claim with a dollar figure and a chosen remedy.
Four fast traps recur. The first is the lowest intermediate balance, where a later lottery win or inheritance is planted to tempt a claim above the lowest point the account reached. Fix the low point and cap the claim. The second is the debt that looks traceable. An unsecured debt is dissipation, so pivot to knowing receipt, and a secured debt opens subrogation under Boscawen. The third is improvements to a volunteer's land, which are likely untraceable. The fourth is depreciation, shared pro rata just as profit is.
The essay bridge, when the paper asks for it, is how far the special tracing rules favour the plaintiff and how fair they are to the unsecured creditors who lose the race to the property.
Consolidation. Tracing is a machine with a fixed order. Establish the fiduciary gateway, run value into the substitute, resolve the mixing on the matching rule, cap the claim at the lowest intermediate balance, choose the richest remedy, then test the defences.
Case index
Foskett v McKeown [2001] 1 AC 102 · In re Hallett's Estate (1880) 13 Ch D 696 · Re Oatway [1903] 2 Ch 356 · Scott v Scott (1964) 109 CLR 649 · Lofts v MacDonald (1974) 3 ALR 404 · James Roscoe (Bolton) Ltd v Winder [1915] 1 Ch 62 · Clayton's Case (Devaynes v Noble) (1816) 1 Mer 572 · Re French Caledonia Travel (2003) 59 NSWLR 361 · Caron v Jahani (No 2) (2020) 102 NSWLR 537 · Re Diplock [1948] 1 Ch 465 · Boscawen v Bajwa [1996] 1 WLR 328
Take it to the practice bank
This module is drilled in the Equity and Trusts practice bank. Every problem there carries a realistic Pass answer, an H1 model answer, and an examiner's comment explaining the decisive fact and where the marks are lost.
Check your understanding
Auto-marked drills. Answer, then see the authority in the feedback.