.With this type of insurance policy the insurer is responsible for claims from events that occurred during the time the policy was in force. It makes no difference when the claim is filed. Example - A customer slips on a wet floor in your store in March 1997. You're covered by Madison Insurance. The customer doesn't file a claim until a year later when you're covered under a new company, Chatham. Under a claims-occurrence basis policy you'd report the claim to Madison, the insurer at the time the accident occurred. Under a claims-made basis you'd report the claim to Chatham, the insurer at the time the claim is filed..Small Business Taxes & Management 2.