Secret Trusts UK (2026): Fully Secret Trusts, Half-Secret Trusts, and How They Operate Outside the Wills Act

A secret trust is a mechanism by which a testator imposes a trust obligation on a legatee — without that obligation appearing on the face of the will. The beneficiaries and terms of the trust are communicated privately, and the will itself appears to make an outright gift: (1) WHY SECRET TRUSTS EXIST — HISTORICAL PURPOSE: before the Probate Act 1857 and after, wills became public documents on probate. Anyone could (and can) inspect a proved will at the Probate Registry. Secret trusts allowed testators to make gifts to people they wished to keep private: (a) illegitimate children (when illegitimacy carried a significant social stigma); (b) a mistress or lover; (c) charitable causes the testator did not wish to disclose; (d) family members whose share the testator preferred not to publicise; (2) HOW A SECRET TRUST WORKS: the testator leaves property in the will apparently to 'A absolutely'. Before death, the testator communicates to A that A is to hold the property on trust for a specified beneficiary (B). A accepts the obligation. On the testator's death, A holds the property as trustee — not for themselves. B (the secret beneficiary) can enforce the trust against A in equity; (3) WHY THE WILLS ACT 1837 DOES NOT INVALIDATE THE TRUST: the Wills Act 1837 requires trusts created by will to be declared in the will itself (s.9). A secret trust is NOT declared in the will — yet it is enforced. The reason: equity intervenes to prevent the Wills Act from being used as an instrument of fraud (Rochefoucauld v Boustead [1897]). If A were allowed to take the property beneficially after accepting the trust obligation, A would be using the statute to perpetrate a fraud on the beneficiary. Equity imposes a constructive trust on A — A is treated as holding the property on constructive trust for B; (4) OPERATING OUTSIDE THE WILL: secret trusts are said to operate 'dehors the will' (outside the will). They are constructive trusts, not express testamentary trusts. They are enforced in equity, not under the Wills Act. The will is the mechanism of transfer — not the creation of the trust itself.

A fully secret trust is one where nothing appears on the face of the will to suggest that a trust exists — the legatee appears to take absolutely. Three requirements must be satisfied: (1) INTENTION: the testator must intend to create a trust obligation — not merely a moral request or hope. The communication must show a clear intention to bind the legatee as trustee. A mere 'wish' or 'request' may be a precatory word that does not create a trust (see Re Adams and the Kensington Vestry [1884] — 'in full confidence' held to be precatory in that context); (2) COMMUNICATION: the trust obligation must be communicated to the intended trustee (the legatee) DURING THE TESTATOR'S LIFETIME. Communication AFTER death is ineffective. Key cases: (a) Wallgrave v Tebbs [1855]: communication after the testator's death was ineffective — legatees took free of the trust; (b) Re Boyes [1884]: a testator told his solicitor he was to hold on trust but never communicated the terms — the solicitor learned the identity of the intended beneficiary only after the testator's death from a letter; held: the trust failed — communication of terms must be in lifetime; (3) ACCEPTANCE: the trustee must accept the trust obligation — expressly or by acquiescence (silence after communication is sufficient if the trustee is placed in a position to communicate dissent). Re Cleaver [1981]: acceptance established by silence; (4) MULTIPLE TRUSTEES: (a) where two trustees are appointed jointly (joint tenants), communication to ONE of them binds BOTH — Re Stead [1900]; (b) where trustees hold as tenants in common, each must be communicated with and accept — communication to one does not bind the other; (5) WHAT COMMUNICATION MUST INCLUDE: the terms must be communicated in lifetime — including the identity of the beneficiaries and the terms of the trust. Re Boyes [1884]: failure to communicate the beneficiary's identity before death is fatal; (6) FRAUD PREVENTION: if the requirements are not met and the would-be trustee refuses to hold on trust, equity does NOT impose a constructive trust — the legatee takes free. Only the threat of FRAUD (taking the gift having accepted the trust) triggers the constructive trust: Wallgrave v Tebbs.

A half-secret trust is one where the will shows that a trust exists, but the terms and beneficiaries of the trust are NOT disclosed on the face of the will: (1) EXAMPLE: 'I give £50,000 to my solicitor Jones to hold on trust for purposes I have communicated to him'. The will discloses a trust — but not its terms or beneficiaries; (2) THE THREE REQUIREMENTS (same as fully secret — but with a crucial timing difference): (a) intention: clear intention to create a trust (not in doubt — the will says 'on trust'); (b) communication of terms: the terms must be communicated; (c) acceptance: acceptance by trustee; (3) THE CRITICAL TIMING DIFFERENCE — COMMUNICATION MUST BE BEFORE OR CONTEMPORANEOUS WITH THE WILL: for a HALF-SECRET trust, communication must be BEFORE OR AT THE TIME of the will's execution. Communication AFTER the will execution will not do. This is the key distinction from fully secret trusts (where communication at any time during the testator's lifetime suffices): (a) Re Keen [1937]: a letter in a sealed envelope was handed to the proposed trustee before the will was made. The will referred to 'terms to be notified'. The court held: the letter handed before execution was valid communication — the trust was enforceable. But a later letter (after will execution) would fail; (b) Re Bateman's WT [1970]: communication after the will was made — trust failed. The testator had communicated the terms in a later document. Held: invalid for a half-secret trust; (4) WHY THE TIMING RULE IS STRICTER FOR HALF-SECRET TRUSTS: the will itself says 'on trust' — so the court knows the testator intended to create a trust. The terms must be fixed and communicated at the time the will is executed — otherwise the trustee could be influenced by post-will communications that the court cannot verify. For fully secret trusts, equity intervenes to prevent fraud regardless of timing (during lifetime); for half-secret trusts, the will already announces the trust, so later communications are not necessary to prevent fraud; (5) FAILURE OF HALF-SECRET TRUST: if the requirements are not met (e.g. communication is too late), the half-secret trust fails. The legatee does NOT take the property beneficially (unlike a failed fully secret trust). Instead, the property falls into RESIDUE — or on a resulting trust back to the estate.

The enforcement of secret trusts rests on an equity principle preventing the Wills Act from being used as an instrument of fraud: (1) THE FRAUD PRINCIPLE: equity intervenes where a statute is used fraudulently or unconscionably. If a legatee accepts a trust obligation from the testator, then later refuses to honour it (claiming the Wills Act 1837 makes the secret trust void), equity treats that refusal as a fraud and imposes a constructive trust. The legatee cannot 'keep' the gift and also 'break' the promise (McCormick v Grogan [1869]); (2) THE CONSTRUCTIVE TRUST MECHANISM: the secret trustee is not an express trustee (the trust is not in the will) but is a CONSTRUCTIVE TRUSTEE. Equity imposes the trust on them by operation of law — regardless of the Wills Act. The constructive trust operates OUTSIDE the will (dehors the will — Johnson v Ball [1851]); (3) WHAT HAPPENS IF THE TRUSTEE PREDECEASES THE TESTATOR: for a fully secret trust: (a) the gift in the will fails (cannot take effect — Wills Act s.15 does not apply to beneficiaries; but if the legatee/trustee predeceases, the gift lapses); (b) the secret trust fails; (c) the intended beneficiary takes nothing; (4) WITNESS-TRUSTEE PROBLEM: under Wills Act 1837 s.15, a witness to the will cannot take a gift under it. If the secret trustee witnesses the will, their gift fails under s.15 — but their obligation as constructive trustee survives (Re Young [1951]). They must transfer the property to the secret beneficiary; (5) IMPLICATIONS FOR THE BENEFICIARY: the secret beneficiary has no direct rights against the estate — their rights are against the trustee personally as constructive trustee. If the trustee is insolvent, the beneficiary may rank as an unsecured creditor; (6) MODERN DEBATE: scholars debate whether secret trusts are truly 'outside the will' or whether they are a special exception to the Wills Act. The dominant view (Ottaway v Norman [1972]) is that they are constructive trusts operating in equity — not testamentary dispositions within the Wills Act.

Secret trusts are rarely used in modern practice. The situations that made them valuable historically are now addressed by better legal tools: (1) WHY SECRET TRUSTS WERE HISTORICALLY USED: (a) privacy — wills become public on probate; a secret trust allowed beneficiaries to be unnamed; (b) gifts to people the testator was embarrassed to name publicly; (c) gifts to mistresses, illegitimate children, or others the testator wished to keep from the family; (2) MODERN ALTERNATIVES: (a) LETTER OF WISHES: a letter of wishes is kept private and not filed at the Probate Registry. For a discretionary trust, the trustee is guided by the letter of wishes — which is not legally binding and not public. This gives substantial privacy without the complexity of a secret trust; (b) PENSION NOMINATION: pension death benefits (lump sum and drawdown) pass outside the estate entirely and are directed by an expression of wishes to the scheme trustees — completely private, no probate; (c) LIFE INSURANCE IN TRUST: a life insurance policy written in trust pays directly to named beneficiaries outside probate — private and fast; (d) BARE TRUST / DECLARATION OF TRUST: a lifetime trust avoids probate entirely — the trust is not in the will and the will does not need to name the beneficiary; (3) TRUST REGISTRATION SERVICE (TRS): since 2022, most trusts (including those that arise outside the estate) must be registered on HMRC's Trust Registration Service — including trusts created by constructive trust. A secret trust may require TRS registration within 90 days; (4) WHEN SECRET TRUSTS MIGHT STILL ARISE: (a) historical disputes — where a testator died without changing arrangements made long ago; (b) academic legal disputes; (c) rare cases where a testator specifically instructs a trustee privately without updating formal documentation; (5) PRACTICAL WARNING: secret trusts depend entirely on the trustee's integrity. If the trustee takes the property and refuses to honour the trust, the secret beneficiary must bring equity proceedings — proving the communication and acceptance in court. This is expensive and uncertain. A professionally advised estate plan using express trusts, nominations, and letters of wishes provides much stronger protection.