Barclays has revealed its conduct is being investigated by the US Department of Justice (DOJ) and US Securities and Exchange Commission.
Both will examine whether the bank's relationships with third parties who help it win or retain business are compliant with the US Foreign Corrupt Practices Act.
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The 53-year-old received the accolade for services to drama from the Duke of Cambridge at Buckingham Palace on Tuesday.
A car bomber reportedly staged a suicide attack near a busy marketplace in Tuz Khurmatu, around 120 miles north of Baghdad.
Zimbabwe's President Robert Mugabe has resigned, ending his 37-year rule of the country.