“Subject to any defences that may arise from the circumstances, a claim for restitution of money paid under a mistake raises three questions. (1) Was there a mistake? (2) Did the mistake cause the payment? And (3) did the payee have a right to receive the sum which was paid to him? The first question arises because the mistake provides the cause of action for recovery of the money had and received by the payee. Unless the payer can prove that he acted under a mistake, he cannot maintain an action for money had and received on this ground. The second question arises because it will not be enough for the payer to prove that he made a mistake. He must prove that he would not have made the payment had he known of his mistake at the time when it was made. If the payer would have made the payment even if he had known of his mistake, the sum paid is not recoverable on the ground of that mistake. The third question arises because the payee cannot be said to have been unjustly enriched if he was entitled to receive the sum paid to him. The payer may have been mistaken as to the grounds on which the sum was due to the payee, but his mistake will not provide a ground for its recovery if the payee can show that he was entitled to it on some other ground.”
“15. A claim is made for a remedy against the defendant as constructive trustee where the defendant’s alleged liability arises out of acts committed within the jurisdiction … 16. A claim is made for restitution where the defendant’s alleged liability arises out of acts committed within the jurisdiction.”
“On the merits of the claim the claimant’s application must show that the claim has “a reasonable prospect of success” (CPR 6.21 (1)(b)), and it has been confirmed by the Court of Appeal that this threshold is the same as if the claimant were resisting an application by the defendant for summary judgment, i.e. “the claimant has no real prospect of succeeding on the claim” (CPR 24.2 ): Carville America Inc v Camperdown UK Ltd[2005] 2 Lloyd’s Rep 457 ; and see De Molestina v Ponton [2002] 1 Lloyd’s Rep. 271, 279-281. It is probable that there is no practical difference between this test and the test for the purposes of RSC Ord. 11, r1(1) of “a serous issue to be tried” in Seaconsar Far East Ltd v Bank Markazi Iran …”
“19. In fact DB London’s belief as set out at paragraph 17 was mistaken. Errors in DB’s calculation of the Available Cash meant that certain positions were overvalued and certain payments that were made out of an account held under one of the Equities Agreements, namely the Listed F & O Agreement entered into with SHI on30 January 2008 , were not reflected in the system that was used to monitor the level of cash and securities held by DB London as collateral under the Equities Agreements. The effect of these mistakes was to overstate the level of cash and securities held by DB London as collateral under the Equities Agreements and to cause an understatement of the Margin Requirement and thereby to overstate the Available Cash. 20. If DB London had been aware of such errors on13 October 2008 the relevant officers would have realised that after payment of the four sums requested by SHI there would have been a deficit in the Cash and Securities Accounts and a Margin Requirement.”
“16. At the time of the relevant Payments and Transfers, as is apparent from the Carroll Statement, the relevant DB staff were not aware of the errors. DB has since corrected these errors and has calculated that if such errors had not been present in the DBX system, that system would have shown the actual level of Available Cash at the close of business on10 October 2008 to have been the equivalent of USD 23,720,715. I attach a schedule prepared for the purposes of this statement … which reconstructs the situation and seeks to demonstrate the level of Available Cash in the Cash Account showing on the DBX system both before and after the calculation errors had been corrected.”
“9. I note that financial markets were generally very volatile around13 October 2008 and the period following that date. For that reason, it would be expected that the value of the assets in SHI’s accounts as well as DB’s margin requirements in respect of those assets may fluctuate from day to day during this period. 10. For the reasons given in paragraphs 6-9, it is not possible to calculate the eventual debt that SHI owed DB by simply subtracting “Available Cash” at the close of business on14 October 2008 from the further sums that are transferred out of the account at that date.”
“15. If, as a result of the payment requests, the value of the assets in the accounts (as determined by DB) would be less than DB’s margin requirement in respect of SHI (i.e. Available Cash would reduce from a positive number to a negative number), DB would not process such requests. In that circumstance, DB would be entitled to retain any Available Cash pursuant to clause 10.7.3.4 of the Equities Prime Brokerage Agreement because processing the requests would immediately result in a margin requirement from SHI. There may also be similar entitlement under clause 10.7.3.3.”
“10.7.1. Cash held by the Prime Broker for the Counterparty in the Cash Account will be repayable on demand. … 10.7.3. In no circumstances will the Prime Broker be required to pay cash to, or to deliver Equivalent Securities to or to the order of the Counterparty where: … 10.7.3.3 the Prime Broker believes in its reasonable discretion that there are potentially payments, expenses, obligations or liabilities which the Prime Broker is or may become subject to in respect of past, current or proposed Transactions; or 10.7.3.4 the Prime Broker reasonable believes that immediately after the payment or transfer there would be a Margin Requirement payable in terms of Clause 4.2 above.”
“37. I am told by Mr Brugelmann that the second attachment to his email (…) is a statement of the value of Vik’s F & O positions. The second page of the statement shows a negative account balance of approximately USD -136.7 million which, after the value of Vik’s open position of approximately USD 111 million (…) is taken into account together with the margining requirement, leaves a margin deficit of approximately USD 67.9 million. 38. Upon receipt of this email, it would therefore have been apparent to Vik that there was a significant deficit in his F & O account and DB’s failure to issue a margin call to cover the margin deficit should have revealed to Vik that DB was mistaken as to the amount of Available Cash when it authorised the Payments. In addition, as set out at paragraph 34 above, Vik was, it is submitted, already aware of the losses that were being incurred with respect to his New York trading and that the margin calls in respect of those losses would be met by transferring sums from his Cash Account to the collateral accounts relating to the FX trading, thereby further depleting the Available Cash.”
“5. This statement was obtained from the Global Prime website to which DB London’s clients have access. The reporting of the F & O positions within the Global Prime website is separate to the DBX system and was unaffected by the errors that DB has discovered were present in the DBX system in October 2008. The USD liquidating value figure referred to above is therefore a correct statement of the USD liquidating value of the positions under the F & O Agreement as at13 October 2008 and is unaffected by the errors I understand were present in the DBX system at that time.”