Railings Enterprises Pvt Ltd v David Bruno Phiri Luwo and Others

Applicant obtained judgment against 3rd respondent (a company) for US$58,335.00 plus interest at 1.5% per month under case HC 243/13. Summary judgment was granted under HC 499/13, which was upheld on appeal (SC 533-13). After discovering 3rd respondent had no assets, applicant obtained an order under HC 2615/15 holding 1st and 2nd respondents personally liable for the debt under section 318 of the Companies Act. Applicant attached 1st and 2nd respondents' immovable property (Subdivision D of Stands 5, 6, 7 and 8 of Matsheumhlope, Bulawayo) for sale in execution. Respondents objected to the sale, claiming the judgment debt had been settled in full. The Sheriff upheld their objection on 30 January 2020, ruling that the in duplum rule applied and respondents had paid the capital debt, interest, and costs totaling $171,463.20. Applicant sought to set aside the Sheriff's ruling, arguing the in duplum rule should not apply and that more interest was owed.

• Whether the in duplum rule applies to limit interest accumulation to an amount equal to the capital debt
• Whether the in duplum rule should be suspended pendente lite (during litigation)
• Whether there were exceptional circumstances warranting departure from the in duplum rule
• Whether the Sheriff correctly upheld the respondents' objection to the confirmation of sale
• The correct interpretation and application of the in duplum rule in Zimbabwean law

The application was dismissed with costs. The Sheriff's ruling upholding the respondents' objection to the confirmation of sale was upheld and not set aside.

The in duplum rule is an established and binding principle of Zimbabwean common law that applies at all stages: pre-litigation, pendente lite, and post-judgment. Interest ceases to accumulate when unpaid interest equals the outstanding capital. Upon judgment, interest runs afresh on the judgment debt (comprising the original capital and pre-judgment interest) but ceases again when accumulated interest equals the judgment debt. There is no suspension of the in duplum rule during litigation. The rule is based on public policy to protect debtors from exploitation and usurious interest. A creditor cannot claim interest in excess of the capital sum (or judgment debt post-judgment) unless exceptional circumstances are demonstrated, which must be substantiated, not merely asserted.

The court made observations about the South African jurisprudential trajectory, noting that the Oneanate principle had been "uprooted" from South African law and characterizing it as a "noxious weed" that should not be transplanted into Zimbabwean jurisdiction. The court noted that while the High Court of Zimbabwe in Ehlers v Standard Chartered Bank (2000) 1 ZLR 136 had dissented from the Commercial Bank of Zimbabwe formulation and preferred the Oneanate approach, the Supreme Court of Zimbabwe has never endorsed the Oneanate reasoning and continues to recognize the in duplum rule as formulated in Commercial Bank of Zimbabwe, as evidenced by Makoni v Commercial Bank of Zimbabwe SC 47-20. The court also observed that applicant's desire to apply its own formula for calculating interest showed "a desire to continue levying interest beyond the recognized and lawful parameters" and that "interest cannot continue to run indefinitely."

This case is significant in Zimbabwean jurisprudence as it firmly reaffirms the in duplum rule as part of Zimbabwe's common law and clarifies its application at all stages of litigation. The judgment explicitly rejects attempts to import the South African Supreme Court of Appeal's now-discredited Oneanate principle (suspension of the rule pendente lite) into Zimbabwean law. The decision aligns Zimbabwean law with the current South African Constitutional Court position in Paulsen. It provides clear guidance on calculating debt under the in duplum rule: interest ceases when it equals capital; upon judgment, interest runs on the judgment debt (capital plus pre-judgment interest) but ceases again when it equals that judgment debt. The case reinforces the public policy basis of the rule - protecting debtors from exploitation and usurious interest accumulation.