In Insurance Company v. Trefz, the United States Supreme Court was asked to decide whether an insurance company was liable for a policyholder’s death. The policyholder, Trefz, had taken out a life insurance policy with the insurance company. After his death, his widow attempted to collect the benefits of the policy. The insurance company refused to pay, arguing that Trefz had failed to disclose a pre-existing medical condition when he applied for the policy. The Supreme Court held that the insurance company was liable for the policyholder’s death. The Court found that Trefz had not intentionally concealed his medical condition, and that the insurance company had not asked him about it. The Court also found that the insurance company had not taken any steps to investigate Trefz’s medical history before issuing the policy. Therefore, the Court held that the insurance company was liable for the policyholder’s death. The Court’s decision in Insurance Company v. Trefz established that insurance companies must take reasonable steps to investigate a policyholder’s medical history before issuing a policy. This decision has been cited in numerous subsequent cases involving insurance companies and policyholders.

Justice Field delivered the dissenting opinion in Insurance Company v. Trefz, arguing that the majority's decision was inconsistent with prior case law and should be overturned. He argued that a contract of insurance is not an ordinary contract, but rather one which requires special consideration due to its nature as a form of security for those who purchase it. As such, he believed that any ambiguity in the language of an insurance policy should be interpreted against the insurer and in favor of providing coverage to their customers. Furthermore, Justice Field noted that while courts have traditionally held insurers liable for damages caused by negligence on their part or on behalf of their agents when issuing policies, this principle had been extended beyond cases involving negligence into other areas where there was no fault on either side; thus making it clear that insurers must provide coverage even if they are unaware or unable to detect potential risks associated with certain activities covered under a policy. Finally, Justice Field concluded his dissent by noting how important it is for individuals purchasing insurance policies to feel secure knowing they will receive compensation if something unexpected happens - regardless whether or not an insurer could have foreseen such events occurring - and therefore urged his colleagues to overturn the majority's ruling so as ensure fairness between both parties involved in these types contracts going forward.