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Board of Directors and Stockholders
Aon Corporation
We are aware of the incorporation by reference in the Registration Statements of Aon Corporation ("Aon") described in the following table of our report dated May 9, 2003 relating to the unaudited condensed consolidated interim financial statements of Aon Corporation included in its Form 10-Q for the quarter ended March 31, 2003.
Registration Statement | | |||
---|---|---|---|---|
Form | Number | Purpose | ||
S-8 | 33-27984 | Pertaining to Aon's savings plan | ||
S-8 | 33-42575 | Pertaining to Aon's stock award plan and stock option plan | ||
S-8 | 33-59037 | Pertaining to Aon's stock award plan and stock option plan | ||
S-3 | 333-50607 | Pertaining to the registration of 369,000 shares of common stock | ||
S-8 | 333-55773 | Pertaining to Aon's stock award plan, stock option plan, and employee stock purchase plan | ||
S-3 | 333-78723 | Pertaining to the registration of debt securities, preferred stock and common stock | ||
S-4 | 333-57706 | Pertaining to the registration of up to 3,852,184 shares of common stock | ||
S-3 | 333-74364 | Pertaining to the registration of debt securities, preferred stock, common stock, share purchase contracts, and share purchase units | ||
S-3 | 333-100466 | Pertaining to the registration as amended of 4,564,824 shares of common stock | ||
S-3 | 333-102799 | Pertaining to the registration of senior convertible debentures and common stock | ||
S-8 | 333-103344 | Pertaining to the registration of common stock | ||
S-4 | 333-103704 | Pertaining to the registration of debt securities |
ERNST & YOUNG LLP
Chicago, Illinois
May 9, 2003