Timothy F. Geithner in 2008 sent the Bank of Englandrecommendations for improving calculations of the London interbankoffered rate, now at the center of a scandal over allegations thebenchmark was manipulated.

Geithner, the U.S. Treasury secretary who was president of theFederal Reserve Bank of New York at the time, sent Bank of EnglandGovernor Mervyn King six recommendations. One was to “establish andpublish best practices for calculating and reporting rates,including procedures designed to prevent accidental or deliberatemisreporting,” according to a memo obtained by Bloomberg News.

Members of Congress are seeking information from U.S. regulatorsabout the scandal that prompted Barclays Plc Chief ExecutiveOfficer Robert Diamond to quit last week after the U.K.'ssecond-biggest lender was fined a record 290 million pounds ($448million) for attempting to rig interest rates. At least a dozenbanks are being investigated for manipulating Libor, the globalbenchmark for $360 trillion of securities.