The part-nationalised lender made the disclosure in its half year results on Friday, where it reported a loss of £1.5bn in the first six months of 2012 and set aside £125m to cover costs related to the recent IT problems.
RBS said the US Federal Reserve and state banking supervisors had been conducting a review into its US operations. It said the regulators had demanded improvements on “deficiencies” in its anti-money laundering procedures and other controls.
“Although the Group cannot currently determine when the review of its operations will be completed or what the outcome of its discussions with UK and US authorities will be, the investigation costs, remediation required or liability incurred could have a material adverse effect on the group’s net assets, operating results or cash flows in any particular period.”
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