May 13 (Bloomberg) — American International Group Inc. defrauded the United States by failing to disclose it was selling insurance without a license during negotiations with the government over a bailout in the financial crisis, a former executive claimed in a lawsuit.

Alex Grabcheski, a former human resources executive at an AIG unit, filed the suit in Manhattan federal court in 2010. Grabcheski's claims under the federal False Claims Act became public today after the U.S. government declined to join his suit, according to court records.

Grabcheski claims the New York-based insurer defrauded the U.S. in 2009 by failing to disclose the unlicensed status of two life insurance units when it negotiated a $25 billion reduction in the amount it owed the Federal Reserve Bank of New York as part of the bailout. Grabcheski is seeking unspecified damages on behalf of the U.S. If he's successful, he'll be awarded a percentage of the recovery.