http://www.nytimes.com/2009/03/20/business/20aig.html?_r=1&hp A.I.G. sued the government last month in a bid to force it to return the payments, which stemmed in large part from its use of aggressive tax deals, some involving entities controlled by the company’s financial products unit in the Cayman Islands, Ireland, the Dutch Antilles and other offshore havens. A.I.G. is effectively suing its majority owner, the government, which has an 80 percent stake and has poured nearly $200 billion into the insurer in a bid to avert its collapse and avoid troubling the global financial markets. The company is in effect asking for even more money, in the form of tax refunds. The suit also suggests that A.I.G. is spending taxpayer money to pursue its case, something it is legally entitled to do. Its initial claim was denied by the Internal Revenue Service last year.