CHICAGO, June 3 /PRNewswire-FirstCall/ -- Aon Corporation (NYSE: AOC) announced today that the five government agencies to its 2005 regulatory settlement agreement have agreed to an amendment that will permit companies acquired by Aon to continue to accept contingent commissions for three years following their acquisition by Aon. Under the amendment, a company acquired by Aon will be able to continue accepting contingent commissions on existing business for three years while it phases out contingents and comes into line with Aon's other business reforms. The government parties to Aon's 2005 settlement agreement are the attorneys general of New York, Illinois and Connecticut, and the insurance departments of New York and Illinois.

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"This amendment advances the goals of transparency and compensation reform in the insurance industry, goals that Aon strongly supports," said David Prosperi, vice president of global public relations with Aon Corporation. "For the last three years, brokers that have not introduced such reforms have had an unfair advantage in bidding to acquire other brokers, because they could assume a continued stream of contingent commissions from the acquired company, whereas Aon could not. This had the perverse result of favoring brokers which still accept contingents and are not transparent to their clients. The amendment agreed to today will permit Aon to compete on a more level playing field when seeking to acquire smaller brokers."

About Aon

Aon Corporation (NYSE: AOC) is the leading global provider of risk management services, insurance and reinsurance brokerage, human capital and management consulting. Through its 36,000 colleagues worldwide, Aon readily delivers distinctive client value via innovative and effective risk management and workforce productivity solutions. Our industry-leading global resources, technical expertise and industry knowledge are delivered locally through more than 500 offices in more than 120 countries. Aon was named the world's "best broker" by Euromoney magazine's 2008 Insurance Survey. Aon also was ranked by A.M. Best as the number one global insurance brokerage in 2007 based on brokerage revenues, and voted best insurance intermediary, best reinsurance intermediary, and best employee benefits consulting firm in 2007 by the readers of Business Insurance. For more information on Aon, log onto http://www.aon.com/.

This press release contains certain statements related to future results, or states our intentions, beliefs and expectations or predictions for the future which are forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from either historical or anticipated results depending on a variety of factors. Potential factors that could impact results include: general economic conditions in different countries in which we do business around the world, changes in global equity and fixed income markets that could affect the return on invested assets, fluctuations in exchange and interest rates that could influence revenue and expense, rating agency actions that could affect our ability to borrow funds, funding of our various pension plans, changes in the competitive environment, our ability to implement restructuring initiatives and other initiatives intended to yield cost savings, changes in commercial property and casualty markets and commercial premium rates that could impact revenues, the outcome of inquiries from regulators and investigations related to compliance with the U.S. Foreign Corrupt Practices Act and non-U.S. anti-corruption laws, the impact of investigations brought by U.S. state attorneys general, U.S. state insurance regulators, U.S. federal prosecutors, U.S. federal regulators, and regulatory authorities in the U.K. and other countries, the impact of class actions and individual lawsuits including client class actions, securities class actions, derivative actions, ERISA class actions, and the cost of resolution of other contingent liabilities and loss contingencies. Further information concerning the Company and its business, including factors that potentially could materially affect the Company's financial results, is contained in the Company's filings with the Securities and Exchange Commission.

   For more information, contact:
   David Prosperi, 312-381-2485, david_prosperi@aon.com
   Joe Micucci, 312-381-4786, joe_micucci@aon.com

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SOURCE: Aon Corporation

CONTACT: David Prosperi, +1-312-381-2485, david_prosperi@aon.com, or Joe
Micucci, +1-312-381-4786, joe_micucci@aon.com, both of Aon Corporation

Web site: http://www.aon.com/