Samuel Liebenberg NO v MGK Bedryfsmaatskappy (Edms) Bpk

The late Hugo Frederick Mokken created a testamentary trust (HF Mokken Will Trust) in his will, appointing his widow as executrix and trustee. The trust was to benefit the testator's widow and three children. The trustee was granted extensive powers under the will to manage the trust estate. On 28 September 1995, the widow, acting as trustee, signed an unlimited deed of suretyship in favor of Magaliesbergse Graankoöperasie Beperk (predecessor to the respondent) for all present and future debts of her eldest son, Jan Alexander Mokken, who was a beneficiary of the trust. The suretyship deed was signed using a company form (headed 'Borgakte (Algemeen Maatskappy)') and throughout referred to the trust as 'die Maatskappy'. When the son's debts were not paid, the respondent sought to sequestrate the trust estate. The appellant, as the current trustee, contested the sequestration on the ground that the previous trustee lacked authority under the trust deed to execute such an unlimited suretyship.

• Whether a testamentary trust deed empowered the trustee to sign an unlimited suretyship in respect of debts of a beneficiary in the absence of an express power conferred by the will
• What test applies when determining whether a power is implied in a trust deed contained in a will
• Whether wide discretionary powers granted to a trustee include the power to expose the trust estate to unlimited liability through suretyship

The appeal was allowed with costs, including costs of two counsel. The provisional sequestration order was discharged with costs.

A trustee of a testamentary trust does not have the power to execute an unlimited suretyship for the debts of a beneficiary unless such power is expressly conferred by the trust deed or can be implied by necessary implication. Wide discretionary powers granted to a trustee, even when described as 'the widest possible powers and unfettered discretion', are subject to and must be exercised in furtherance of the express provisions and purpose of the trust deed. A provision can only be implied in a trust deed contained in a will by necessary implication, applying the same principles as those used to imply tacit terms in contracts. At common law, a trustee has no power to expose trust assets to business or farming risks, including through suretyships, absent express provision in the trust deed. Where a testator confers numerous specific powers but omits the power to stand surety, and where such a power would be inconsistent with the trust's fundamental purpose (such as preserving capital and ensuring equal distribution among beneficiaries), such power cannot be implied.

The Court indicated it was unnecessary to decide whether a trustee might be empowered to provide a limited suretyship for an amount less than a beneficiary's anticipated share on final distribution, leaving this question open for future determination. The Court observed that the suretyship deed in this case was executed carelessly, using an inappropriate company form and referring to the trust as 'die Maatskappy' throughout, suggesting inadequate consideration preceded the execution. The Court noted that if it were indeed necessary to preserve trust assets by standing surety, the trustee should have applied to court for the necessary power, as established in trust law. Farlam JA also commented that the phrase 'brought into account' in paragraph 4(4) of the trust deed, while potentially ambiguous, should be interpreted restrictively to mean adjustments in final distribution accounts rather than permitting advances exceeding a beneficiary's share that would require payment back into the trust.

This case establishes important principles regarding the interpretation of testamentary trusts and the limits of trustee powers in South African law. It confirms that wide discretionary language in trust deeds does not automatically confer unlimited powers on trustees, particularly where such powers would contradict the fundamental purpose of the trust. The judgment reinforces the strict approach to implying powers in trust deeds, requiring necessary (not merely reasonable) implication using the same test as for tacit terms in contracts. It reaffirms the common law principle that trustees lack inherent power to expose trust assets to commercial risks through mechanisms like suretyships unless expressly granted. The case serves as an important warning about the limits of trustee authority and the consequences of trustees exceeding their powers, even when acting with subjectively good intentions to benefit beneficiaries. It emphasizes that courts will protect the testator's intention and the interests of all beneficiaries against unauthorized actions that could defeat the trust's purpose.