In the case of John Hancock Mutual Life Insurance Co. v. Bartels, 1939, the U.S Supreme Court ruled in favor of policyholders who had assigned their life insurance policies to a trustee for the benefit of a local lodge affiliated with an international fraternal organization. The court held that such assignments were not fraudulent as per New Jersey law and did not violate public policy or any provision in the insurance contracts prohibiting assignment without consent from insurers. The decision was based on reasoning that these assignments were made for valid consideration and served legitimate purposes like providing sick benefits to members or funeral expenses upon death rather than speculative ones.

In the dissenting opinion for John Hancock Mutual Life Insurance Co. v. Bartels, Justice Black argued that the majority's decision was inconsistent with previous rulings and could potentially undermine the security of insurance policies nationwide. He contended that allowing a third party to claim ownership over an insurance policy without any evidence of transfer or assignment from the original owner sets a dangerous precedent. In his view, this ruling would open up possibilities for fraud and manipulation in life insurance transactions by enabling anyone who possesses an insurance policy to assert ownership rights regardless of how they obtained it. Furthermore, he disagreed with the majority's interpretation of New Jersey law on which their decision heavily relied upon.