Hank Greenberg, the former chief executive of American International Group, faces possible civil charges from US regulators in connection with a scheme that flattered the company’s financial statements.

Mr Greenberg, who left in 2005 when AIG was hit by an accounting scandal, has received a Wells notice from the Securities and Exchange Commission in relation to his alleged role in reinsurance transactions between AIG and General Re, a subsidiary of Berkshire Hathaway.