THONG SOON SENG V MAGNUS ENERGY GROUP LTD

[2023] SGHC 5 High Court (General Division) 2 February 2023 HC/S 1075/2020

12 cases cited (10 SG, 2 foreign) Cited by 6 cases

Key facts

Court	High Court (General Division)
Decided	2 February 2023
Judge	Vinodh Coomaraswamy
Charges / claim	Contract, Restitution, Evidence
Counsel	Clasis LLC, Eldan Law LLP, Koh Choon Guan Daniel, Koh Junxiang, Lim Khoon, Ng Pi Wei, Prakash Pillai, Wong Hui Yi Genevieve

Source: [2023] SGHC 5, High Court (General Division), decided 2 February 2023 — eLitigation. Updated 10 July 2026.

Catchwords

Contract - Breach Restitution - Unjust enrichment Restitution - Absence of consideration Restitution - Mistake - Mistake of fact Evidence - Proof of evidence - Onus of proof Restitution - Failure of consideration - Total failure of consideration

Practice Areas

Contract Restitution Evidence

Judges (1)

Vinodh Coomaraswamy Delivered

Counsel (8)

Clasis LLC Firm Eldan Law LLP Firm Koh Choon Guan Daniel Counsel for the defendant Koh Junxiang Counsel for the plaintiff

Lim Khoon Counsel for the defendant

Ng Pi Wei Counsel for the plaintiff Prakash Pillai Counsel for the plaintiff Wong Hui Yi Genevieve Counsel for the defendant

Parties (2)

Magnus Energy Group Ltd Defendant

Thong Soon Seng Plaintiff

Case Significance

Thong Soon Seng v Magnus Energy Group Ltd [2023] SGHC 5 was decided in the General Division of the High Court by Vinodh Coomaraswamy J on 2 February 2023, in Suit No 1075 of 2020. It was common ground that the plaintiff, Thong Soon Seng, paid a total of $4m to the defendant, Magnus Energy Group Ltd, in September and October 2016; the plaintiff's case was that the sum was repayable as the combined result of three loan agreements, and he sought recovery in debt or alternatively in unjust enrichment. The defendant accepted receiving the $4m but denied it was a loan, asserting instead that the payment was made to discharge a debt owed by a third party to a subsidiary of the defendant. The catchwords span contract breach and restitution issues including unjust enrichment, mistake of fact, absence of consideration and total failure of consideration.

Summary

Thong Soon Seng claimed that Magnus Energy Group Ltd was obliged to repay $4m he had paid it in 2016, asserting the sum was advanced under three loan agreements and seeking recovery in debt or, alternatively, unjust enrichment. The defendant accepted receiving the money but denied it was a loan, contending the payment discharged a third party's debt. Vinodh Coomaraswamy J found the plaintiff failed to prove the payment was a loan or to establish any unjust factor, dismissed the claim, and ordered costs of $132,300.

What was the dispute in Thong Soon Seng v Magnus Energy Group Ltd [2023] SGHC 5?

The plaintiff, Thong Soon Seng, paid $4m to Magnus Energy Group Ltd in September and October 2016 and sought its recovery as three loans, in debt or unjust enrichment. The defendant accepted receipt but said the money discharged a third party's debt to its subsidiary.

Which judge decided Thong Soon Seng v Magnus Energy Group Ltd ([2023] SGHC 5)?

Vinodh Coomaraswamy J delivered the grounds of decision in the General Division of the High Court on 2 February 2023 in Suit No 1075 of 2020. The catchwords addressed contract breach and restitution, including unjust enrichment, mistake of fact and total failure of consideration.

Statutes Cited

Evidence Act (Cap 97) Cases on this Act →

s 105

Cases Cited (12)

SG (1)

[2018] SGHC 233

SLR (9)

[2002] 1 SLR(R) 1136 [2010] 1 SLR 428 [2011] 2 SLR 865 [2013] 3 SLR 801 [2018] 1 SLR 239 [2018] 1 SLR 363 [2019] 1 SLR 30 [2022] 1 SLR 136 [2022] 2 SLR 314

UK (2)

[1968] 1 WLR 1083 [1985] 1 WLR 948