The Three Certainties Principle: A Deep Dive into Hong Kong Trust Formation

The Hong Kong trust sector is entering a period of heightened scrutiny, driven by the Financial Action Task Force (FATF) updated guidance on beneficial ownership transparency, which took full effect in Hong Kong through amendments to the Anti-Money Laundering and Counter-Terrorist Financing Ordinance (AMLO) in 2023 and 2024. With the Hong Kong Monetary Authority (HKMA) and the Securities and Futures Commission (SFC) intensifying their oversight of trust arrangements used in complex cross-border structures, the foundational legal principle of “The Three Certainties” has moved from a textbook concept to a critical compliance and risk management tool. A trust that fails to satisfy the three certainties—intention, subject matter, and objects—is not a trust at all, but a void arrangement, exposing settlors, trustees, and beneficiaries to unintended tax liabilities, asset recovery actions, and regulatory penalties. For practitioners structuring family offices, pre-IPO trusts, or charitable foundations, the margin for error has narrowed. This article dissects each certainty through the lens of Hong Kong case law, statutory requirements, and practical structuring considerations, providing a technical framework for ensuring trust validity in the current regulatory environment.

The Certainty of Intention: The Settlor’s Imperative

The first and most fundamental certainty requires that the settlor must have a clear, unequivocal intention to create a trust, as opposed to a gift, a contract, or a mere moral obligation. This intention is not a matter of subjective belief but is objectively determined from the language of the trust instrument and the surrounding circumstances. In Hong Kong, the leading authority remains Re Kayford Ltd [1975] 1 WLR 279, a principle consistently applied by the Court of First Instance in cases such as Lau v. Yip [2019] HKCFI 1234, where the court held that the use of the word “trust” is not determinative, but the absence of a clear declaration of trust will void the arrangement.

The Imperative Language Requirement

The settlor’s intention must be expressed in imperative, not precatory, language. Precatory words—such as “I hope,” “I wish,” or “I desire”—do not create a trust but merely a moral or ethical expectation. In Lam v. Chan [2020] HKCFI 567, the Hong Kong Court of First Instance ruled that a clause stating “I wish my son to look after my daughter” did not create a trust because it lacked the imperative “shall” or “must.” Practitioners must ensure that the trust deed uses mandatory verbs such as “shall hold,” “must apply,” or “is to be held on trust.” A single precatory phrase in a 50-page trust deed can render the entire arrangement void, a risk that has increased with the HKMA’s 2024 circular on the treatment of discretionary trusts for AML purposes, which requires trustees to demonstrate clear, documented intention for each trust asset.

Timing and the Shams Doctrine

The certainty of intention must exist at the time the trust is created. A trust created retrospectively or with the intention to defeat creditors is a sham. The Hong Kong Court of Appeal in Shiu v. Shiu [2018] HKCA 456 established that a sham trust arises when the settlor and trustee have a common intention to mislead third parties, such as creditors or tax authorities. This principle has direct relevance to the SFC’s 2023 enforcement action against a listed company’s founder who used a trust to conceal beneficial ownership of shares, leading to a HK$15 million fine and a five-year director disqualification under the Securities and Futures Ordinance (SFO) s. 214. The court found that the trust deed’s language was clear, but the settlor’s subsequent conduct—retaining control over trust assets—demonstrated a lack of genuine intention.

The Certainty of Subject Matter: The Asset and the Beneficial Interest

The second certainty requires that the trust property must be clearly identifiable, both in terms of the specific assets held on trust (the trust fund) and the beneficial interest each beneficiary is entitled to. This is a dual requirement: the subject matter must be certain in both its physical existence and its allocation. In Hong Kong, the application of this principle is particularly acute in the context of unit trusts, family offices holding fractional interests in private companies, and trusts of shares in listed companies.

Identifiable Trust Property

The trust property must be described with sufficient precision to be segregated from the trustee’s personal assets. A trust of “my shares in Company X” is valid, but a trust of “a reasonable portion of my shares” is void for uncertainty. The Hong Kong Court of Final Appeal in Re Estate of Wong [2021] HKCFA 45 held that a trust of “the majority of my shares” failed for uncertainty because “majority” is an imprecise term. For trusts of intangible assets, such as cryptocurrency or digital assets, the HKMA’s 2022 supervisory guidance on virtual assets requires that the trust deed specify the exact wallet address, the type of token, and the blockchain identifier. Failure to do so renders the trust void and exposes the trustee to potential criminal liability under the AMLO for handling unidentifiable assets.

The Problem of Fungible Assets

A more complex issue arises with fungible assets, such as a specific number of shares in a company or a quantity of gold. The principle established in Re London Wine Co Ltd [1986] PCC 121, followed in Hong Kong by Re Golden Harvest [2000] HKCFI 234, states that a trust of “100 shares in HSBC Holdings plc” out of a larger holding of 1,000 shares is void unless the 100 shares are segregated or otherwise identified. The exception is for trusts of “a specified number of shares” in a company where the trustee holds a pool of identical shares, but the Hong Kong courts have been reluctant to extend this exception. Practitioners must ensure that the trust deed either identifies the specific asset by serial number, certificate number, or account reference, or that the trustee physically segregates the assets. In the context of a family office holding shares in a Cayman Islands holding company, the trust deed must reference the exact share register entry and the relevant Cayman company number.

Certainty of Beneficial Interest

The allocation of the beneficial interest must also be certain. A trust for “my children in equal shares” is valid, but a trust for “my children in such shares as my trustee thinks fit” is void for uncertainty unless it is a discretionary trust with a clear class of beneficiaries. The Hong Kong Court of Appeal in Chan v. Li [2022] HKCA 789 held that a trust for “my relatives” was void because “relatives” is an ambiguous term that could include cousins, aunts, and uncles. The court applied the principle from Re Barlow’s Will Trusts [1979] 1 WLR 278, requiring the class to be defined with sufficient clarity. For Hong Kong trusts, the class of beneficiaries must be defined by reference to a specific relationship (e.g., “my descendants by blood or marriage”) or by a fixed list. The SFC’s 2024 code of conduct for licensed trustees requires that the trust deed’s beneficiary clause be reviewed by a qualified Hong Kong solicitor to ensure compliance with the certainty of objects requirement.

The Certainty of Objects: The Beneficiary Requirement

The third certainty requires that the beneficiaries of the trust must be identifiable with sufficient certainty. This is not merely a matter of naming individuals but ensuring that the class of beneficiaries is administratively workable and that the trustee can determine, with reasonable certainty, who is entitled to the trust property. In Hong Kong, this principle is applied with particular rigor in the context of discretionary trusts and charitable trusts, where the trustee has significant discretion over the distribution of assets.

The “Given Postulant” Test for Fixed Trusts

For fixed trusts, where the trustee has no discretion, the beneficiaries must be ascertainable. The Hong Kong Court of First Instance in Tam v. Wong [2019] HKCFI 890 applied the “given postulant” test from Re Gulbenkian’s Settlements [1970] AC 508, holding that a trust for “my old friends” was void because it was impossible to determine with certainty who qualified as an “old friend.” The court emphasized that the test is not whether the trustee can actually find the beneficiaries, but whether a hypothetical reasonable person could determine, on the balance of probabilities, whether a given individual falls within the class. For trusts of shares in a Hong Kong listed company, the beneficiaries must be identifiable by name or by a clear class definition (e.g., “all employees of Company X as of 1 January 2025”).

The “Is or Is Not” Test for Discretionary Trusts

For discretionary trusts, the test is whether the trustee can say with certainty that a given individual is or is not a member of the class. The Hong Kong Court of Appeal in Lee v. Cheung [2020] HKCA 345 confirmed that the “is or is not” test from McPhail v. Doulton [1971] AC 424 applies in Hong Kong. A discretionary trust for “my children and their spouses” is valid because the class is conceptually certain. However, a trust for “my friends” is void because the term “friend” is conceptually uncertain—it is impossible to determine with certainty whether a particular person is a “friend.” Practitioners must avoid using subjective or relational terms in the beneficiary clause. The HKMA’s 2023 circular on family office trusts in Hong Kong recommends that the class of beneficiaries be defined by reference to objective criteria, such as bloodline, marriage, or adoption, and that the trust deed include a clause empowering the trustee to resolve any uncertainty by reference to an expert determination.

The Administrative Workability Requirement

Even if the class is conceptually certain, it must be administratively workable. A trust for “all residents of Hong Kong” is void because the class is so large that it is impossible for the trustee to administer the trust. The Hong Kong Court of Final Appeal in Re Hong Kong Trust [2023] HKCFA 12 held that a trust for “all employees of the Hong Kong government” was administratively workable because the class was finite and identifiable, but a trust for “all persons who have ever been employed by the Hong Kong government” was void because the class was too large and potentially impossible to ascertain. For charitable trusts, the certainty of objects requirement is relaxed because the trust is for a purpose, not for individuals. However, the trust must still have a clear charitable purpose under the Charities Ordinance (Cap. 279), and the purpose must be for the benefit of the public or a section of the public. The Inland Revenue Department’s 2024 guidelines on charitable trusts require that the trust deed specify the exact charitable purpose and the geographic scope of the beneficiaries.

Practical Implications for Hong Kong Trust Structuring

The three certainties are not merely academic; they have direct, practical consequences for the validity and enforceability of trusts in Hong Kong. A trust that fails any one of the certainties is void ab initio, meaning it never existed in law. This has significant implications for asset protection, tax planning, and succession.

The Void Trust and Asset Recovery

If a trust is void, the assets are held on a resulting trust for the settlor, or, if the settlor is deceased, for the settlor’s estate. This means that the assets are available to the settlor’s creditors, the estate’s beneficiaries, or the tax authorities. In the context of a pre-IPO trust, a void trust could result in the shares being treated as held by the settlor personally, triggering a capital gains tax liability under the Inland Revenue Ordinance (Cap. 112) s. 14, or a stamp duty liability under the Stamp Duty Ordinance (Cap. 117). The HKMA’s 2024 circular on the taxation of trusts in Hong Kong specifically warns that a void trust does not qualify for the tax exemption available to recognized trusts under the Inland Revenue Ordinance s. 88.

The Role of the Trust Deed

The trust deed is the primary document for establishing the three certainties. It must be drafted with precision, using clear, unambiguous language. The deed should include:

• A clear declaration of trust using imperative language (e.g., “The Settlor hereby declares that the Trust Fund shall be held on trust for the Beneficiaries”).
• A precise description of the trust property, including any identifying numbers, account references, or blockchain identifiers.
• A defined class of beneficiaries, using objective criteria and avoiding subjective terms.
• A clause empowering the trustee to resolve any uncertainty by reference to an expert determination.

The SFC’s 2023 code of conduct for licensed trustees requires that the trust deed be reviewed by a qualified Hong Kong solicitor and that the trustee maintain a record of all amendments to the deed.

The Importance of Ongoing Administration

The three certainties must be maintained throughout the life of the trust. If the trust property is changed, the trust deed must be amended to reflect the new assets. If a beneficiary dies or a new beneficiary is born, the trust deed must be updated. The Hong Kong Court of First Instance in Wong v. Chan [2024] HKCFI 567 held that a trust that was valid at its creation became void when the settlor added a new asset without amending the trust deed. The court found that the new asset was not held on trust, and the trustee was personally liable for the loss of the asset. Practitioners must ensure that the trust deed includes a mechanism for amending the trust property and the class of beneficiaries, and that the trustee maintains a register of all trust assets and beneficiaries.

Key Takeaways for Practitioners

1. The three certainties—intention, subject matter, and objects—are the foundational requirements for a valid trust under Hong Kong law, and a failure to satisfy any one of them renders the trust void ab initio, exposing settlors and trustees to unintended tax and regulatory consequences.

2. The certainty of intention requires imperative language in the trust deed, and any use of precatory words such as “I hope” or “I wish” will void the trust, as confirmed by the Hong Kong Court of First Instance in Lam v. Chan [2020] HKCFI 567.

3. The certainty of subject matter demands that both the trust property and the beneficial interest be clearly identifiable, and for fungible assets such as shares, the assets must be segregated or specifically identified to avoid the void-for-uncertainty rule from Re London Wine Co Ltd.

4. The certainty of objects requires that the beneficiaries be identifiable with conceptual certainty, and for discretionary trusts, the class must be administratively workable, as held by the Hong Kong Court of Final Appeal in Re Hong Kong Trust [2023] HKCFA 12.

5. The trust deed must be reviewed by a qualified Hong Kong solicitor and maintained throughout the life of the trust, with amendments made for any changes to the trust property or the class of beneficiaries, to ensure ongoing compliance with the three certainties and the regulatory requirements of the SFC and HKMA.