* Ruling could undermine London's financial industry
* Lawyers say ruling gives clarity to duty of care
* Daiwa declines to comment on ruling
* Liquidator says final claim expected to be $200 million (Adds detail, reaction, background)
By Huw Jones
LONDON, Oct 30 (Reuters) - Daiwa Capital Markets Europe lost a court appeal on Wednesday that leaves the Japanese bank facing a $150 million damages bill and reinforces the expected duty of care between a bank and a corporate customer.
The court was ruling on a dispute between Singularis Holdings, now in liquidation, and London-based investment bank Daiwa, a subsidiary of Daiwa Securities Group Inc of Japan.
The case relates to a payment Daiwa made at the request of the main shareholder in Singularis and whether it had sufficiently carried out its duty as a financial institution to guard against fraud.
It was the first time that courts have found against a bank in respect of the so-called Quincecare duty of care for banker-customer relations, named after a court case involving Barclays bank and a company called Quincecare in 1992.
It raises the prospect of a much higher duty of care burden for financial institutions when it comes to dealing with corporate clients.
"The Supreme Court’s decision develops the law with regard to the nature and scope of the duty owed by financial institutions to their corporate customers in situations where fraud is suspected," said Christian Tuddenham, a lawyer at Jenner & Block that assisted Singularis' liquidator, Grant Thornton.
The Supreme Court unanimously dismissed Daiwa's appeal and upheld an earlier High Court order.
"Denial of the claim would undermine the public interest in requiring banks to play an important part in uncovering financial crime and money laundering," the court said.
Daiwa declined to comment.
The ruling could leave Britan's financial sector, already vulnerable to loss of business to the European Union because of Brexit, at risk of losing more business to other jurisdictions, said Oliver Lodge, who acted as an expert witness in the case.
"It does change the recognised level of liability for banks and other financial institutions," said Lodge, also a councillor for the City of London, municipal authority for the capital's financial district.
Singularis went into liquidation after Daiwa paid $200 million from Singularis' trading account to third parties on instructions from Singularis' sole shareholder Maan Al Sanea.
Indebted billionaire Sanea was detained in Saudi Arabia after his company Saad defaulted together with another conglomerate in 2009, leaving banks with unpaid debts of around $22 billion.
Payments made in 2009 were a misappropriation of Singularis' funds, leaving it unable to meet creditor demands, the Supreme Court said.
"Daiwa should have realised that something suspicious was going on and suspend payment until it had made reasonable enquiries to satisfy itself that the payments were properly made," the court said.
Daiwa was "well aware" of the dire straits Saad and Sanea were in at the time and Singularis has been the victim of Daiwa's negligence, it added.
The High Court had upheld a claim by Singularis for damages amounting to $150 million.
Grant Thornton said the ruling will help insolvency practitioners pursue claims in future, and it expects the total amount to be about $200 million, including interest and costs.
Daiwa had unsuccessfully argued that Singularis was a one-man company and would therefore have known if there was misappropriation.
"The context in this case is the breach of Daiwa's Quincecare duty of care. To attribute the fraud of a trusted agent of the company to the company would denude the duty of any value in cases where it is most needed and be a retrograde step," the Supreme Court said.
Reporting by Huw Jones, editing by Jason Neely and Elaine Hardcastle