Home Billing Claims Careers About Us Contact Us Contact Us Contact Billing Services Contact Us Home Contact Us Home Office Ohio Casualty PO Box 188025 Fairfield, OH 45018 Main switchboard number: 1-800-843-6446 Claims For commercial lines losses relating to policies written by Ohio Casualty, you should report these losses to Ohio Casualty ANYTIME Claim Service™ at 1-866-255-5530. Billing If you have a question about your bill, or need help with online billing, you can use the Contact Billing Services form or call us to reach a customer service representative using the contact information below: For active personal lines policyholders, please call 866-223-9928 available Monday-Friday 8am-4:30pm EST For active business lines policyholders, please call 866-290-2920 available Monday-Friday 8am-8pm EST Need to Report a Claim? Call the Ohio Casualty ANYTIME Claims Service™ at 1-866-255-5530 (toll-free) anytime, anywhere. Privacy Policy | Terms & Conditions | Fraud Protection | Site Map Ohio Casualty, 175 Berkeley Street, Boston, MA 02116 ©2021 Liberty Mutual Insurance