Cecil Wright & Partners commenced proceedings in the High Court on 14 July 2026 against Nik Storonsky, the co-founder and chief executive of Revolut, claiming €17.5 million in commission on his purchase of a 102-metre Lürssen for a reported €350 million.[1] The brokerage says that it was the effective cause of the acquisition and that a commission of 5 per cent is due on it. Storonsky denies liability. The defence reported this month introduces an unfamiliar item of evidence into a dispute otherwise governed by a century of agency law, because he says that he already knew who had owned the yacht, having found the connection through a ChatGPT search of publicly available information.[2]
No one suggests that a generative model negotiated a €350 million purchase, nor does the pleading go near such a claim. It does something narrower and more useful, since an exchange with a chatbot is advanced as evidence of how a buyer came to know whom to approach. The question of how a buyer came by that knowledge belongs to the law of effective cause, which English judges have been applying to yacht brokers for the better part of two decades.
One yacht, two transactions
Nixie was commissioned from Lürssen by Patrick Dovigi, the Canadian founder of GFL Environmental. A contractual interest in the project appears to have been transferred during construction in 2024 to the Brazilian financier Daniel Vorcaro, then the president of Banco Master.[3] Storonsky’s family office approached Cecil Wright in October 2024 about a new build, then wrote again on 19 July 2025 to ask about an interim vessel to use while that build proceeded. Cecil Wright identified the Lürssen project in Germany and says that its client remained interested in acquiring her.[4]
Vorcaro was detained at Guarulhos airport on 17 November 2025 in connection with an alleged fraud of R$12.2 billion involving Banco Master, allegations he has contested.[5] The negotiations in which Cecil Wright had been engaged came to nothing, Dovigi recovered the vessel and on 12 January 2026 he sold her to Storonsky, four months before Lürssen delivered her on 26 June 2026.[6]
Everything turns on how that sequence is described. For Cecil Wright there was one acquisition process, interrupted by an unusual change of ownership and completed by the client without the broker. For Storonsky there were two transactions, the first of which failed after the arrest and the second of which began independently with a seller the brokerage had never introduced to him.
Whether Vorcaro ever held title to the vessel is not established on the public record. The material that can be opened suggests he did not. She was launched in February 2026 and delivered on 26 June 2026, both of them after his arrest, so there was no delivery to him at which title to a finished ship could pass. Her flag is the Marshall Islands, whose registry publishes nothing searchable, so the transcript of register that would settle the question is obtainable only on application.[7] Brazilian reporting describes the 2024 transaction as the acquisition of a position under the building contract, records that he never went aboard and says that Dovigi recovered the vessel by invoking contractual clauses once payments were not made.[8]
The liquidator of Banco Master has subpoenaed Lürssen in Chapter 15 proceedings in the United States for the contracts and the records of transfers, which is the conduct of an office-holder trying to establish what happened rather than one holding a conveyance.[9] The point bears on the shape of the defence. If what passed in 2024 was a contractual position that reverted before delivery, the available material is consistent with Dovigi either having remained the relevant contractual counterparty before the January sale or having become that counterparty again. A different beneficial or contractual interest during construction is not necessarily a different seller of the completed yacht. That does not answer the causal question, since Moran shows that a long interval and fresh negotiations can break the chain whoever the seller turns out to be, although it weakens one of the two planks on which the reported defence rests.
First, was there a commission agreement?
There is a question before effective cause. What, if anything, had Storonsky agreed to pay?
No conventional written brokerage agreement has been identified in the public reporting of the filings. The material reported so far includes an email from Storonsky’s team on 19 July 2025 referring to the “commercial arrangements you would expect from this” and using the word “commission”. Cecil Wright claims 5 per cent of the €350 million purchase price, although no report of the filings traces that percentage to an agreed term.[10]
The sequence is important, because the appeal in Moran Yacht & Ship Inc v Pisarev did not turn on effective cause. The Court of Appeal dismissed the broker’s appeal because neither the express nor the implied terms of the agreements entitled it to the commission claimed. Christopher Clarke LJ therefore found it unnecessary to decide whether Males J had been right on causation.[11] Before asking whether Cecil Wright caused the purchase, the court will have to determine what bargain the parties made and what it entitled the brokerage to be paid.
The effective cause rule
An agent whose remuneration depends on bringing about a transaction must ordinarily show that it was the effective cause of that transaction. Males J restated the rule in Moran by reference to Chitty and to the formulation in Nahum v Royal Holloway and Bedford New College, under which the claimant has to establish that “it was his actions that really brought about the relation of buyer and seller”.[12] The agent need not be the immediate cause, although the connection between what the agent did and the transaction that followed has to be sufficient to support the claim.
Berezovsky and Moran
Boris Berezovsky instructed Edmiston & Co on 14 May 2008 to market the 110-metre Darius on a discreet and non-exclusive basis. Merle Wood, a Florida broker, passed the details to Captain Wrigley, who showed them to Abdullah Al Futtaim on 13 July 2008. The Al Futtaim family bought the yacht through Paragon International on 22 October 2008 for €240 million.[13]
The purchasers dealt directly and had no wish to negotiate through the brokers. Field J held that Edmiston was nonetheless the effective cause, on the footing that the Al Futtaims had no knowledge of Darius’s existence, let alone of her availability, until the information reached them by that route.[14] The Court of Appeal upheld the finding and reduced the reasonable rate from 3 per cent to 2.5 per cent, which produced an award of €6 million.[15]
Moran went the other way on its facts. Lidia Tsareva showed 4YOU to Alexander Miliavsky on 18 May 2010 and nothing came of the visit, which Males J found to have been short and unserious. Some 21 months later a company controlled by Miliavsky contracted to buy the vessel for €19.8 million after discussions that had arisen independently. The judge held that Moran had not been the effective cause, the earlier introduction forming part of the history without having brought the transaction about.[16]
That holding has to be read with the appeal already described. Males J’s decision in Moran illustrates how a long interval and a fresh set of negotiations can break the chain, although the Court of Appeal expressly left that causation analysis undecided and disposed of the case on the agreements instead. Both authorities differ from this dispute in the direction of the retainer. Moran and Edmiston were each engaged on the sell side and claimed against the owner who had instructed them, whereas Cecil Wright is claiming against a buyer whose family office had approached it.
Where the search enters the chain
Cecil Wright has an argument from Berezovsky available on its own pleaded case. The client was looking for an interim yacht, the broker identified this one, brought the opportunity to his attention and remained engaged while he pursued it. That he concluded matters without the brokerage does not by itself answer whether the commission was earned.
Storonsky’s reported defence is closer to Moran. The proposed transaction with Vorcaro failed after the arrest, Dovigi resumed control of the project and the negotiations that produced the January 2026 sale are said to have begun without any introduction from Cecil Wright. The same vessel therefore stands at the centre of two competing accounts of what occurred between November 2025 and January 2026.
The ChatGPT search has a part to play only within the second account. If the route by which Storonsky came to know of Dovigi’s connection with the yacht is disputed, the interaction may support an alternative explanation of how that knowledge reached him. That is a modest function for a generative model, although it is capable of bearing on €17.5 million.
A prompt as evidence
A party who says that information came from ChatGPT raises a different evidential question from one who says that it came from a named person, a document or a database, because the model is not the underlying source. Where the point is contested, potentially relevant disclosable material could include the prompt, the response, the date and any contemporaneous step taken as a result, together with the public information from which the answer could have been drawn.
No AI response proves ownership of a yacht and none is offered here for that purpose. The proposition advanced is narrower, since the interaction would be evidence that Storonsky held particular information at a particular time and, if the record supports it, evidence of the route by which he obtained it. Much of the litigation about generative models has turned on the unreliability of what they produce, whereas the question in this case may be whether somebody asked before the broker answered.
The brokers in the background
Chris Cecil-Wright, who founded Cecil Wright & Partners in February 2013, has appeared in the reports of English superyacht commission litigation before.[17] Field J recorded that Nicholas Edmiston reported the meeting of 14 May 2008 to his son Jamie, who managed the London office, as well as to another of his senior brokers, Chris Cecil-Wright.[18] Eighteen years later his own firm is asking the High Court to apply the same test to another nine-figure transaction.
There is a further coincidence in the professional cast. Moran Yacht & Ship, the claimant in the authority that helps Storonsky, was the build manager for Nixie and says on its own website that it managed the project from contract through her subsequent sale.[19] Whether that role touched the January 2026 transaction is not apparent from the public record, which is a matter the pleadings should settle.
Darius supplies the closer parallel. She too was commissioned by one owner, was sold before completion to another and produced a commission claim that reached the Court of Appeal. She is afloat today as Radiant, owned by the family that bought her in 2008. The law that decided her case in 2010 is the law that will decide this one. What has changed is the evidence by which a buyer may seek to prove that he found his own way to the seller. This time, part of that evidence is a ChatGPT search.
[1] The claim was issued in the High Court on 14 July 2026. Dentons UK and Middle East act for Cecil Wright & Partners and Hannaford Turner for Storonsky. €17.5 million is 5 per cent of €350 million. YachtBuyer, “Cecil Wright sues Revolut founder Nik Storonsky for €17.5m over alleged superyacht commission”, 4 August 2026, records that the filings describe the vessel only as a 102-metre Lürssen that was nearing delivery, so the identification with Nixie comes from the reporting rather than from the pleadings. Sifted gives the rate as 8 per cent, which is inconsistent with the arithmetic and with every other report.
[2] Bloomberg, “Revolut CEO Found €350 Million Yacht’s Ex-Owner Via ChatGPT, His Lawyers Say”, 16 September 2026.
[3] SuperYachtFan, NIXIE, recording that the yacht was commissioned by Patrick Dovigi, founder of GFL Environmental, was sold during construction to a Brazilian owner and was then reacquired by Dovigi. The Brazilian buyer is identified as Daniel Vorcaro in the reporting of the claim.
[4] Marine Industry News, as above, for the October 2024 and July 2025 approaches. Superyacht Investor, “Cecil Wright sues Revolut founder Storonsky”, 7 August 2026, gives the completion date of 12 January 2026.
[5] Reuters, “Banco Master owner Vorcaro detained by Brazil police”; Wikipedia, Daniel Vorcaro, recording the detention at São Paulo Guarulhos on 17 November 2025 and the alleged R$12.2 billion in fraudulent transactions with Banco de Brasília.
[6] SuperYacht Times, “102m Lürssen superyacht Nixie delivered”, giving delivery on 26 June 2026, a length of 102.4 metres and the build name Project JASSJ. YachtBuyer, “First Look: Secretive 102m Lürssen Superyacht Jassi Revealed at Launch”, 6 February 2026, covers the launch and still describes the operative sale as the 2021 contract. Boat International, 27 July 2026, records that “the project was sold by Moran Yacht & Ship in 2021”.
[7] Flag and identity from vessel databases giving IMO 9954541, MMSI 538072853 and a Marshall Islands flag. International Registries publishes no searchable public register, and Equasis, GISIS, MarineTraffic, VesselFinder and the DNV register were each login-walled, robots-blocked or returned nothing. No record that could be opened names Vorcaro or any vehicle of his as registered owner. A transcript of register for IMO 9954541, obtainable from International Registries on application, would settle the question.
[8] FatoNews, 8 August 2026, reporting that “sem que os pagamentos pelo barco fossem feitos, Dovigi ativou cláusulas contratuais para reaver a embarcação” and describing a protection and reversal clause allowing the original seller to resume control of the building contract with Lürssen. Seu Dinheiro and BP Money both use “posse”, meaning possession, rather than “propriedade”, and both record that Vorcaro never went aboard. None of these outlets publishes the contract, so the account is single-stranded and untested.
[9] Revista Oeste and Jornal de Brasília, September 2026, reporting that the liquidator of Banco Master, Eduardo Felix Bianchini, subpoenaed Lürssen on 15 June 2026 for contracts, agreements, letters of intent and records of money transfers, with a deadline of 2 July, in Chapter 15 proceedings in the United States. The Nixie appears on neither of the published asset-freeze lists in the Banco Master liquidation, the only vessel on those lists being a yacht moored in Florida valued at about R$80 million.
[10] Superyacht Investor, “Cecil Wright sues Revolut founder Storonsky”, 7 August 2026, reporting that the email of 19 July 2025 from Storonsky’s team referred to “commercial arrangements you would expect from this” and used the word “commission”. No written brokerage agreement is described in any report of the filings, and the 5 per cent is the rate claimed rather than a rate any report traces to an agreed term.
[11] Moran Yacht & Ship Inc v Pisarev [2016] EWCA Civ 317, 11 February 2016, dismissing the appeal from [2014] EWHC 1098 (Comm). caselaw.nationalarchives.gov.uk/ewca/civ/2016/317
[12] Moran Yacht & Ship Inc v Pisarev [2014] EWHC 1098 (Comm) at [94] and [95], citing Nahum v Royal Holloway and Bedford New College [1999] EMLR 252. caselaw.nationalarchives.gov.uk/ewhc/comm/2014/1098
[13] Berezovsky v Edmiston & Company Ltd [2010] EWHC 1883 (Comm) at [9], [17] and [18]. caselaw.nationalarchives.gov.uk/ewhc/comm/2010/1883
[14] Ibid at [47].
[15] Berezovsky v Edmiston & Company Ltd [2011] EWCA Civ 431, 19 April 2011, per Jackson LJ. caselaw.nationalarchives.gov.uk/ewca/civ/2011/431
[16] Moran at [102], where the judge found that Moran was not the effective cause, or even an effective cause, of the sale of 4YOU.
[17] Cecil Wright & Partners Limited, company number 08412005, incorporated 20 February 2013 (Companies House).
[18] Berezovsky [2010] EWHC 1883 (Comm) at [9].
[19] moranyachts.com, project page for NIXIE, which lists Moran Yacht & Ship as build manager and states that it “managed the project from contract through her subsequent sale”. The page does not identify which sale is meant.