Cryptocurrency Legal Disputes in London: Emerging Case Law Explained

Cryptocurrency legal disputes in London have moved from a niche corner of commercial law into one of the most fast-moving areas of English jurisprudence. In the space of just a few years, the High Court and Court of Appeal have had to grapple with questions that no judge faced even a decade ago: Can Bitcoin be owned? Can you freeze a crypto wallet? Can software developers owe a duty of care to users whose coins get stolen?

The answers coming out of English courts are reshaping not just how lawyers handle crypto fraud cases, but how the entire world thinks about digital asset property rights. London, with its combination of an independent judiciary, well-developed equity jurisdiction, and deep financial expertise, has become a go-to venue for crypto litigation — and the case law it is producing is both progressive and, occasionally, surprising.

This article walks through the most important cryptocurrency court cases in the UK, explains the legal principles being built up around them, covers the new legislation Parliament is introducing, and tells you what it all means if you hold, trade, or invest in digital assets in England and Wales. Whether you are an investor, a startup founder, a solicitor, or just someone trying to understand how the law is catching up with blockchain technology, this is the guide you need.

Cryptocurrency Legal Disputes in London: Why English Courts Matter

London did not stumble into this role by accident. The English legal system has several features that make it particularly well-suited for crypto asset litigation:

• Equity jurisdiction: English courts can issue injunctions and freeze assets quickly, even before a defendant is identified, which is critical in fraud cases where speed is everything.
• Flexibility in service: Courts have allowed claimants to serve proceedings via NFT airdrop, email, and even social media — recognising that traditional postal service is useless when dealing with anonymous blockchain actors.
• Common law adaptability: English courts have a long tradition of developing property law through case-by-case reasoning, which suits the evolving legal framework for digital assets.
• Global enforcement: A judgment or freezing order from the High Court in London carries significant weight internationally, making it easier to chase assets across borders.

The result is that many victims of crypto fraud — even those based in other countries — choose to bring their claims in London because the remedies available here are simply better than elsewhere.

How English Law Classifies Cryptocurrency as Property

The Foundational Case — AA v Persons Unknown [2019]

The starting point for nearly every cryptocurrency legal dispute in London is the landmark 2019 High Court decision in AA v Persons Unknown. In that case, the court was asked whether Bitcoin could be treated as property for the purposes of granting a proprietary injunction to freeze stolen coins.

Bryan J said yes. Relying on the UK Jurisdiction Taskforce’s Legal Statement on Cryptoassets and Smart Contracts (published the same month), the court held that Bitcoin qualifies as property under English law, even though it does not fall neatly into either of the two traditional categories — things in possession or things in action.

This was not a small decision. Once crypto is property, a whole range of legal remedies become available: proprietary injunctions, freezing orders, tracing claims, and constructive trust arguments. Almost everything that followed in UK cryptocurrency litigation has built on this foundation.

D’Aloia v Persons Unknown [2024] — The First Full Trial

For several years after AA, the key crypto cases in London were decided at the interim stage — meaning courts were only asked whether claimants had a “good arguable case,” not whether they had actually won. That changed in September 2024.

In D’Aloia v Persons Unknown [2024] EWHC 2342 (Ch), the High Court conducted a full trial and, for the first time in English legal history, handed down a final determination that cryptocurrency is capable of attracting property rights under English law. The case involved a victim who had lost around £2.5 million to a sophisticated online fraud, with funds flowing through multiple crypto exchanges including Bitkub.

The judgment is significant for several reasons:

• It confirmed that crypto’s property status is not just an interim finding but a settled point of English law.
• It examined the defences available to crypto exchanges, confirming that a platform can defend itself using change of position and bona fide purchaser arguments — but only if it was genuinely acting in good faith.
• It demonstrated how difficult it remains to succeed at trial even when the law is on your side, because the evidentiary bar for tracing crypto through complex blockchain transactions is extremely high.

For anyone pursuing crypto fraud recovery in the UK, the lesson from D’Aloia is that the law will help you — but you need very good forensic evidence to get there.

Cryptocurrency Legal Disputes in London Involving Anonymous Defendants

The “Persons Unknown” Problem

One of the most distinctive features of crypto litigation in London is how routinely it involves defendants whose identities are completely unknown. On a blockchain, transactions are pseudonymous. A thief can be anywhere in the world. By the time a victim realises what has happened, the stolen coins may have been passed through dozens of wallets across multiple chains.

English courts have developed a remarkable body of law for exactly this situation.

In Boonyaem v Persons Unknown [2023], the High Court refused to grant summary judgment because the defendant had not been sufficiently identified. But the courts moved on quickly from that conservative position. In Mooij v Persons Unknown [2024], the court took a more flexible approach: provided that service on the defendants was valid — even service via unconventional means — relief could be granted even against entirely anonymous fraudsters. This signals a growing willingness from English judges to ensure that the anonymity of blockchain transactions does not permanently shield fraudsters from accountability.

Serving Defendants in Crypto Cases

Traditional service rules assume you know who you are serving. Crypto fraud cases often involve defendants with no known name, address, or jurisdiction. English courts have authorised:

• Service via email to addresses associated with the fraud
• Service via NFT airdrop directly into a defendant’s wallet
• Service via social media platforms where contact was first made

These innovations in civil procedure are one of the reasons London has become a preferred forum for digital asset disputes globally. Courts in most other jurisdictions simply have not developed this toolkit yet.

Key Remedies in London Cryptocurrency Litigation

Proprietary Injunctions and Worldwide Freezing Orders

When a victim of crypto fraud approaches the High Court in London, the most urgent priority is usually stopping the stolen coins from being moved further or cashed out. The two main tools for this are:

Proprietary injunctions — these freeze specific identified assets (usually specific wallet addresses) on the basis that the claimant has a proprietary claim over them. Courts have consistently granted these in crypto cases since AA v Persons Unknown.

Worldwide Freezing Orders (WFOs) — these go further, freezing all assets of a defendant up to a specified value, wherever in the world they may be. Because English equity acts against the person rather than the asset, WFOs can be issued even before a defendant’s identity is known, and even against third parties like cryptocurrency exchanges that are holding the relevant assets.

In one illustrative case, a victim who had invested £27,000 in Bitcoin through a fraudulent scheme called “Matic Markets” was granted both a proprietary injunction and a WFO by the High Court. The court confirmed jurisdiction on the basis that the claimant was resident in England and the funds had been transferred from an English bank account — following the principle established in Ion Science v Persons Unknown that the lex situs (location) of a crypto asset is determined by the domicile of the owner.

Crypto Wallet Freezing Orders — A New Criminal Law Tool

On the criminal law side, the Economic Crime and Corporate Transparency Act 2023 introduced amendments to the Proceeds of Crime Act 2002 that created a specific new instrument: Crypto Wallet Freezing Orders (CWFOs). Since April 2024, law enforcement agencies in the UK have been able to apply for these orders to freeze specific cryptocurrency wallets without needing to arrest or charge anyone first.

This is a significant development because it gives regulators and prosecutors a civil forfeiture-style mechanism that can move at blockchain speed — fast enough to prevent dissipation before suspects disappear.

The Tulip Trading Case — Can Software Developers Be Sued?

Fiduciary Duties and Decentralised Networks

The most conceptually ambitious cryptocurrency legal dispute in London in recent years is Tulip Trading Ltd v Bitcoin Association for BSV [2023] EWCA Civ 83. The facts sound almost implausible: Tulip Trading claimed to own approximately $4 billion worth of Bitcoin that became inaccessible after a hack destroyed the private keys needed to access the wallets.

Unable to access the coins through normal means, Tulip sued the software developers who maintain Bitcoin’s open-source code, arguing that they owed a fiduciary duty to update the software in a way that would restore Tulip’s access. The argument was that anyone who controls the software that governs a network on which others rely takes on duties similar to those of a trustee.

The Court of Appeal, in a judgment by Justice Colin Birss, refused to dismiss the claim at the preliminary stage and remitted it for a full trial. The court found the question genuinely arguable: if a decentralised network’s developers can effectively determine who can access funds, do they owe duties to the owners of those funds?

The implications are profound. If Bitcoin developers can be held to fiduciary standards, the entire premise of decentralisation — the idea that no individual controls the network — comes into question. The case also reinforced that Bitcoin is property under English law, a point that by 2023 was well on its way to being settled.

Smart Contracts and the Legal Landscape for DeFi Disputes

Where English Law Still Has Gaps

While London courts have made enormous strides on property status and fraud remedies, decentralised finance (DeFi) and smart contract disputes remain relatively underexplored in the case law. The core problem is structural: a smart contract executes automatically according to code. If the code has a bug, or if the outcome is different from what the parties intended, there is no company to sue and no regulator to call.

English contract law can theoretically apply to smart contracts — the Law Commission confirmed in its 2023 digital assets report that smart contracts are capable of being legal contracts under English law. But the practical questions — who has standing to sue, where jurisdiction lies, how to identify the counterparty — remain largely unanswered by case law.

This is an area where London crypto litigation is likely to develop significantly in the next few years, as DeFi grows and disputes inevitably follow.

The Southgate v Graham Case — Crypto Loan Disputes

A more conventional but still instructive case is Oliver Southgate v Adam Graham [2024] EWHC 1692 (Ch). This was a cryptocurrency loan dispute in which the defendant had borrowed Ethereum tokens and failed to return them. The Chancery Division had to decide how to calculate damages for a breach of a crypto loan agreement — specifically, which date to use as the valuation point for the returned ETH.

The High Court varied the valuation date to account for Ethereum’s significant price appreciation between the breach in 2019 and the date of judgment. This is practically important: it confirms that English courts will take seriously the volatile nature of crypto assets when calculating compensation, and will not simply use an arbitrary fixed date that might significantly undervalue the claimant’s loss.

The Property (Digital Assets etc.) Bill — New Legislation Explained

What the Bill Does

In September 2024, the UK government introduced the Property (Digital Assets etc.) Bill to the House of Lords. The Bill does something simple but important: it provides statutory confirmation that certain digital assets — including cryptocurrency — can be recognised as a distinct third category of personal property under English law, sitting alongside things in possession and things in action.

Why does this matter if the courts have already said crypto is property? Because statutory recognition:

• Removes any residual uncertainty about how the legal status of digital assets will be treated in future cases
• Provides clearer protection in insolvency situations, where the question of whether crypto belongs to a customer or to the exchange’s general creditors has huge practical consequences
• Strengthens the hand of victims seeking remedies in disputes involving divorce settlements, inheritance, and commercial contracts
• Gives Parliament a foundation on which to build more detailed regulatory rules

The Bill passed through Parliament and received the backing it needed to establish this framework in English law.

The FCA Regulatory Framework — What Is Coming in 2026

Alongside case law developments, the Financial Conduct Authority is building a full UK crypto regulatory regime expected to go live in 2026. A draft order published in April 2025 — the Financial Services and Markets Act 2000 (Regulated Activities and Miscellaneous Provisions) (Cryptoassets) Order 2025 — sets out key proposals including:

• Regulated roles for crypto exchanges operating in or from the UK
• Regulated roles for stablecoin issuers
• Authorisation requirements for firms offering crypto custody services
• Consumer protection rules aligned broadly with those applicable to traditional investment products

For anyone involved in cryptocurrency legal disputes in London, this regulatory backdrop matters because it will define what compliance looks like, what duties exchanges owe their users, and what enforcement actions the FCA can take. You can track the FCA’s consultation and policy updates directly at FCA.org.uk.

Jurisdiction and Conflict of Laws in UK Crypto Disputes

Establishing English Court Jurisdiction

One of the trickiest issues in cryptocurrency litigation in the UK is establishing that English courts have jurisdiction at all. The parties are often in multiple countries. The exchanges are frequently registered in offshore jurisdictions like the Cayman Islands or Seychelles. The fraudsters are unknown and could be anywhere.

English courts have developed a workable approach. Since Ion Science v Persons Unknown (2020), the rule has been that the lex situs of a crypto asset — the law of the place where it is located — follows the domicile of its owner. So if you are resident in England and someone steals your Bitcoin, English courts have jurisdiction over the dispute.

This is genuinely innovative. There is no physical location for a Bitcoin wallet in the traditional sense, so the courts had to create a legal fiction, and they chose one that maximises access to justice for English-based victims.

The key practical points are:

1. English residency of the victim generally gives English courts jurisdiction
2. Funds transferred from an English bank account strengthen the jurisdictional argument
3. The fact that an exchange is based offshore does not automatically oust English jurisdiction
4. Third-party exchanges receiving traceable stolen assets can be brought into English proceedings

For further analysis of how English courts approach jurisdiction in complex multi-party fraud cases, the Law Commission’s Digital Assets Final Report remains an essential reference.

Cryptocurrency Legal Disputes in London — What Victims Can Actually Do

Practical Steps for Crypto Fraud Victims

If you have been the victim of crypto fraud in the UK, the legal toolkit available in London is more powerful than most people realise. Here is a practical overview of the main options:

Step 1: Act fast. Frozen assets cannot be moved. The longer you wait, the further the coins travel through wallets and mixing services. Emergency injunctions can be applied for without notice and granted within 24-48 hours.

Step 2: Instruct specialist solicitors. This is not general commercial litigation. You need lawyers who understand blockchain forensics, how exchanges operate, and the specific case law that governs crypto claims.

Step 3: Obtain a blockchain forensics report. The evidentiary requirement in cases like D’Aloia is demanding. You need an expert who can trace the flow of funds through the blockchain and identify wallet addresses controlled by the defendant or by exchanges that received stolen proceeds.

Step 4: Apply for a proprietary injunction and/or WFO. Courts will grant these on a without-notice basis if there is urgency and a good arguable case. You will need to give a cross-undertaking in damages (promising to compensate the defendant if the injunction turns out to have been wrongly granted).

Step 5: Pursue the exchange. If traceable stolen assets flowed through a regulated exchange, that exchange may be susceptible to a Bankers Trust order (requiring disclosure of account holder information) and potentially to a proprietary claim if it received assets as constructive trustee.

Step 6: Consider the new Crypto Wallet Freezing Order regime. If the fraud has a criminal dimension, law enforcement agencies can now seek CWFOs independently of any civil claim.

Challenges That Remain

Despite real progress, significant challenges remain in cryptocurrency legal disputes in London:

• Anonymous defendants are hard to enforce judgments against even when you win
• Exchange cooperation is inconsistent, particularly with platforms based in permissive offshore jurisdictions
• Expert evidence on blockchain tracing is expensive and the methodology is still being tested by courts
• Volatility in crypto prices means that the value of a claim can change dramatically between the fraud and the trial

The Howells Case — When Crypto Law Meets Physical Property

One case that illustrates how unexpectedly broad cryptocurrency legal disputes can become is the ongoing litigation brought by James Howells against Newport City Council. Howells claims to have discarded a hard drive containing the private keys to approximately 8,000 Bitcoin — worth hundreds of millions of pounds — which now sits buried in a council landfill.

In 2024, Howells filed a claim in the High Court seeking a declaration that he is the legal owner of the hard drive and an order compelling excavation. The court had to grapple with whether the private key code on the hard drive could constitute a “third category” type of property — and whether Howells had any actionable claim against the council for its refusal to allow excavation.

The case is a vivid illustration of the point made by experts at Pinsent Masons: the law must continue to evolve to deal with the realities of a digital society. The question of what rights attach to physical media containing cryptographic keys is genuinely novel, and the Howells case has forced English courts to think carefully about it.

Conclusion

Cryptocurrency legal disputes in London sit at the intersection of ancient equitable principles and genuinely new technology, and the English courts have met that challenge with more agility than might have been expected. From the foundational property ruling in AA v Persons Unknown to the full trial in D’Aloia, from the audacious Tulip Trading fiduciary duty argument to the introduction of Crypto Wallet Freezing Orders, London has built a sophisticated and growing body of UK crypto case law that is the envy of most other jurisdictions.

The Property (Digital Assets etc.) Bill has now cemented crypto’s property status in statute, and a full FCA regulatory regime is on its way by 2026 — meaning the legal landscape for digital asset disputes in the UK is not just catching up with the technology, but beginning to lead it. For anyone who holds, trades, or builds in the crypto space, understanding this body of law is no longer optional — it is essential.