As filed with the Securities and Exchange Commission on March 1, 2005 Post-Effective amendment No. 1 to Registration Statement on Form S-8 (NO. 333-73740) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 OHIO CASUALTY CORPORATION (Exact name of registrant as specified in its charter) OHIO 31-0783294 (State or other jurisdiction (IRS Employer 	of incorporation)	Identification No.) 9450 Seward Road Fairfield, Ohio 45014 (Address, including zip code, of principal executive offices) Employment Agreement, Effective as of September 19, 2001, between Ohio Casualty Corporation and Donald F. McKee (Full title of the Plan) Debra K. Crane Senior Vice President, General Counsel and Secretary Ohio Casualty Corporation 9450 Seward Road Fairfield OH 45014 (513) 603-2400 (Name, address, and telephone number, including area code, of agent for service) Page 1 of 3 DEREGISTRATION OF 250,000 SHARES OF COMMON STOCK This Post-Effective Amendment No. 1 to Registration Statement No. 333-73740 on Form S-8 filed on November 20, 2001 by Ohio Casualty Corporation (the "Registrant") is filed to deregister under the Securities Act of 1933, as amended (the "Securities Act"), 250,000 of the 450,000 shares that were originally registered on this Registration Statement but were never issued. SIGNATURES 	Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Post-Effective Amendment to the Registration Statement on Form S-8 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Fairfield, State of Ohio, on the 25th day of February, 2005. OHIO CASUALTY CORPORATION By: /s/ Debra K. Crane ------------------------------------- Debra K. Crane, Senior Vice President, General Counsel and Secretary Page 2 of 3 Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the persons and in the capacities and on the dates indicated: Signature Title Date /s/ Dan R. Carmichael - ---------------------- February 25, 2005 Dan R. Carmichael President/Chief Executive Officer and Director /s/ Michael A. Winner - ---------------------- Michael A. Winner Chief Financial Officer February 25, 2005 /s/ Terrence J. Baehr - ---------------------- February 25, 2005 Terrence J. Baehr		Director /s/ Jack E. Brown - ---------------------- February 25, 2005 Jack E. Brown Director /s/ - ----------------------- William P. Boardman		Director /s/ Catherine E. Dolan February 25, 2005 - ----------------------- Catherine E. Dolan		Director /s/ Philip G. Heasley February 25, 2005 - ----------------------- Philip G. Heasley		Director /s/ Ralph S. Michael III February 25, 2005 - ------------------------ Ralph S. Michael III		Director /s/ Stanley N. Pontius February 25, 2005 - ----------------------- Stanley N. Pontius Lead Director /s/ Jan H. Suwinski February 25, 2005 - --------------------- Jan H. Suwinski Director /s/ Michael L. Wright February 25, 2005 - ---------------------- Michael L. Wright		Director /s/ Robert A. Oakley					February 25, 2005 - ---------------------- Robert A. Oakley		Director Page 3 of 3