Case Details
- Citation: [2022] SGHC 46
- Title: CLM v CLN and others
- Court: High Court of the Republic of Singapore (General Division)
- Suit No: 470 of 2021
- Summons Nos: SUM 2444 of 2021; SUM 4880 of 2021
- Date of decision: 4 March 2022
- Hearing dates: 8 June 2021 (SUM 2444); 9 November 2021 (SUM 4880)
- Judge: Lee Seiu Kin J
- Plaintiff/Applicant: CLM
- Defendants/Respondents: CLN and others (including persons unknown and entities operating cryptocurrency exchanges)
- Legal areas: Civil Procedure — Amendments; Civil Procedure — Mareva injunctions; Civil Procedure — Injunctions; Civil Procedure — Proprietary injunction; Civil Procedure — Parties — Joinder; Civil Procedure — Service — Substituted service out of jurisdiction
- Statutes referenced: Civil Law Act; First Schedule of the Supreme Court of Judicature Act
- Cases cited: [2022] SGHC 46 (as provided in metadata)
- Judgment length: 38 pages; 10,843 words
Summary
In CLM v CLN and others ([2022] SGHC 46), the High Court considered two “novel” questions arising from a dispute involving alleged theft of cryptocurrency. First, the court addressed whether stolen cryptocurrency assets—specifically Bitcoin (“BTC”) and Ethereum (“ETH”)—can be the subject of a proprietary injunction. Second, it examined whether the court can grant interim relief against “persons unknown”, ie, defendants whose identities are not yet known at the time the application is made.
The plaintiff, CLM, commenced an action to trace and recover 109.83 BTC and 1497.54 ETH allegedly misappropriated from him by unidentified persons. Portions of the alleged stolen assets were traced to digital wallets controlled by cryptocurrency exchanges operating in Singapore. In two ex parte applications, the plaintiff sought (i) proprietary and freezing relief, together with disclosure orders to assist tracing and identification, and (ii) leave to join additional defendants and amend the writ, including steps to serve parties out of jurisdiction.
The court granted the applications, allowing the interim measures sought. In doing so, it confirmed that, on the facts, the proprietary injunction framework could extend to cryptocurrency assets, and it accepted that the court has jurisdiction to grant interim orders against persons unknown where the evidential threshold for such relief is met and the orders are appropriately framed. The decision also provides practical guidance on joinder, amendments, and service out/substituted service in cross-border cryptocurrency disputes.
What Were the Facts of This Case?
The plaintiff, CLM, is a United States national and an entrepreneur who claimed ownership of the “Stolen Cryptocurrency Assets” comprising 109.83 BTC and 1497.54 ETH. The plaintiff alleged that these assets were misappropriated through theft by unidentified persons (described in the proceedings as the “first defendants”, ie, “persons unknown”). At the time of the interlocutory applications, the plaintiff was unable to identify precisely who the alleged thieves were.
In addition to the persons unknown, the plaintiff identified two entities (the “second and third defendants”) that operated cryptocurrency exchanges with operations in Singapore. These entities were incorporated in the Cayman Islands and Seychelles respectively. The plaintiff’s tracing exercise indicated that portions of the alleged stolen BTC and ETH had been transferred to digital wallets associated with the exchanges operated by the second and third defendants. However, the plaintiff’s position at the time of the applications was that these exchange operators were likely innocent third parties and that the substantive claim against them was limited to disclosure to assist tracing and identification of the persons unknown.
The court also considered the technical and legal nature of BTC and ETH to determine whether they could be treated as property capable of supporting proprietary relief. The judgment explained that cryptocurrencies are not “currency” in the traditional sense because they are not backed by a physical asset or a central issuer. Instead, BTC and ETH are records maintained on decentralised networks and stored in publicly available ledgers (blockchains). These ledgers provide a permanent audit trail of transactions, allowing the movement of cryptocurrency to be tracked through wallet addresses.
Crucially, the court described how access to cryptocurrency is controlled through cryptographic “private keys” linked to wallet addresses. A wallet address functions loosely like an account number, while the private key operates like the authorising signature required to transfer funds out of the wallet. The judgment further noted that losing the private key can render the funds inaccessible, and that many users back up private keys using recovery seeds. This technical background underpinned the court’s analysis of whether the stolen cryptocurrency could be identified and restrained by proprietary injunctions.
What Were the Key Legal Issues?
The case raised two core legal issues. The first was whether stolen cryptocurrency assets can be the subject of a proprietary injunction. Proprietary injunctions are traditionally associated with identifiable property and are used to restrain a defendant from dealing with property in a manner inconsistent with the claimant’s asserted proprietary interest. The court had to decide whether BTC and ETH, as intangible digital assets recorded on blockchains, could satisfy the requirements of identifiability and proprietary character for interim proprietary relief.
The second core issue concerned jurisdiction and the scope of interim relief against persons unknown. The plaintiff sought orders directed at the first defendants, who were not identified individuals or entities at the time of the application. The court had to consider whether it had jurisdiction to grant interim orders against unknown defendants and, if so, what safeguards and framing are required to ensure fairness and enforceability.
Beyond these, the applications also involved procedural questions: whether disclosure orders could be made against exchange operators to assist tracing and identification; whether the writ could be amended and additional parties joined; and whether service out of jurisdiction and substituted service could be effected in the circumstances of a cross-border cryptocurrency dispute.
How Did the Court Analyse the Issues?
The court began by setting out the nature of BTC and ETH to anchor the proprietary injunction analysis in an accurate understanding of what the assets are and how they are controlled. It emphasised that cryptocurrencies are recorded on blockchains and that transactions are publicly verifiable. While the “currency” label can be misleading, the blockchain provides a reliable and permanent audit trail. This audit trail, coupled with the ability to trace transfers between wallet addresses, supports the notion that cryptocurrency holdings can be identified for legal purposes.
In addition, the court explained the role of private keys in authorising transfers. The ability to transfer cryptocurrency depends on possession of the private key (or equivalent control mechanisms). This matters for proprietary injunctions because the practical effect of such injunctions is to restrain dealing with the asset. If the asset can be identified and the defendant’s control over it can be linked to the alleged wrongdoing, the court can craft orders that prevent dissipation or dealing.
On the first legal issue—whether a proprietary injunction can attach to stolen cryptocurrency—the court applied the established proprietary injunction framework. The analysis focused on whether there was a serious question to be tried that the plaintiff had a proprietary interest in the stolen assets and whether the assets were sufficiently identifiable as property. The court’s reasoning reflected that, although cryptocurrency is intangible, it is not “unproperty-like”; rather, it can be treated as property capable of being traced and restrained. The blockchain record and the tracing evidence were central to this conclusion.
On the second issue—jurisdiction against persons unknown—the court considered the circumstances in which interim orders may be made where the defendants’ identities are unknown. The court treated the “persons unknown” category as a procedural device that allows claimants to seek effective relief against those who carried out or assisted the wrongdoing, even if they cannot yet be named. However, the court’s willingness to grant such relief is not automatic. It depends on whether the claim is sufficiently particularised, whether the interim orders are framed to target the wrongdoing and the assets in question, and whether the court can ensure that the orders are workable and fair.
The judgment also addressed the balance of convenience and the need for interim protection. In granting proprietary and freezing relief, the court considered the risk of dissipation and the practical reality that cryptocurrency can be moved rapidly across wallets and jurisdictions. The court’s approach reflected the purpose of Mareva-type relief: to prevent defendants from frustrating judgment by removing assets beyond the reach of the court. Where the assets are traceable but the defendants are unknown, interim measures become particularly important to preserve the status quo.
Finally, the court dealt with disclosure orders and procedural steps. Disclosure orders against exchange operators were sought to assist tracing and identification. The court accepted that disclosure can be appropriate where it is necessary to progress the claim and where the defendants are likely to hold information relevant to the tracing exercise. The court also considered joinder and amendment: it allowed the plaintiff to join additional parties believed to have participated in or assisted the theft, or entities that received the stolen assets. Service out of jurisdiction and substituted service were addressed to ensure that the court’s orders could be effectively served on parties outside Singapore, consistent with procedural fairness and the requirements of the relevant procedural rules.
What Was the Outcome?
The High Court allowed the plaintiff’s applications in SUM 2444 and SUM 4880. It granted interim relief including a proprietary injunction restraining dealing with, disposing of, or diminishing the Stolen Cryptocurrency Assets, and a worldwide freezing injunction to prevent dissipation up to the value of the alleged stolen BTC and ETH. The court also granted ancillary disclosure orders against the exchange operators to assist tracing and identification of the persons unknown.
In addition, the court granted leave to join further defendants and to amend the writ. It also permitted steps for service out of jurisdiction, including substituted service where appropriate, thereby enabling the proceedings to move forward against parties who were not initially identified and/or were located outside Singapore.
Why Does This Case Matter?
CLM v CLN is significant for practitioners because it confirms that proprietary injunctions can extend to cryptocurrency assets in Singapore. For claimants seeking to trace and recover digital assets, the decision provides authority that BTC and ETH may be treated as property capable of supporting proprietary relief, provided the assets are identifiable and the evidential threshold for interim relief is met. This is particularly important in fraud and theft cases where the assets are intangible but can be tracked through blockchain records.
The case is also a leading authority on interim jurisdiction against persons unknown. It demonstrates that the court can grant effective interim orders even where the defendants’ identities are not yet known, which is often the reality in cyber-enabled thefts and crypto scams. For lawyers, the decision underscores the need to frame “persons unknown” orders carefully, supported by evidence that links the unknown defendants to the alleged wrongdoing and the assets to be restrained.
From a procedural perspective, the decision offers practical guidance on joinder, amendments, disclosure, and service out/substituted service in cross-border cryptocurrency disputes. Exchange operators and other intermediaries often sit at the intersection of tracing and identification. The court’s willingness to order disclosure supports the claimant’s ability to obtain information necessary to convert an unknown-defendant claim into a properly constituted action against identified parties.
Legislation Referenced
- Civil Law Act (Singapore) — including provisions relevant to injunctions and/or the court’s powers in civil proceedings (as referenced in the judgment)
- First Schedule of the Supreme Court of Judicature Act (Singapore) — including provisions relevant to the High Court’s jurisdiction and/or procedural framework for interim relief (as referenced in the judgment)
Cases Cited
- [2022] SGHC 46 (CLM v CLN and others)
Source Documents
This article analyses [2022] SGHC 46 for legal research and educational purposes. It does not constitute legal advice. Readers should consult the full judgment for the Court's complete reasoning.