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CONSENT OF ERNST & YOUNG LLP, INDEPENDENT REGISTERED
PUBLIC ACCOUNTING FIRM
Board of Directors and Stockholders
Aon Corporation
We consent to the incorporation by reference in the Registration Statements of Aon Corporation described in the following table of our report dated August 4, 2004, with respect to the unaudited condensed consolidated interim financial statements of Aon Corporation included in its Form 10-Q for the quarter ended June 30, 2004.
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 2,707,018 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-8 | 333-106584 | Pertaining to Aon's deferred compensation plan |
ERNST & YOUNG LLP | ||
Chicago, Illinois August 4, 2004 |
CONSENT OF ERNST & YOUNG LLP, INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM