Insurance Companies v. Boykin was a case heard by the United States Supreme Court in 1871. The case involved a dispute between two insurance companies and a man named Boykin. Boykin had taken out a policy with one of the companies, but the other company argued that it had a prior claim to the policy. The Supreme Court ultimately ruled in favor of Boykin, finding that the other company did not have a prior claim to the policy. The Court held that the policy was valid and enforceable, and that the other company had no right to interfere with it. The Court also held that the other company was not entitled to any compensation for its claim. This decision established the principle that insurance companies must honor the terms of their policies and that they cannot interfere with the rights of policyholders. The decision also established the principle that insurance companies must act in good faith when dealing with policyholders.

In Insurance Companies v. Boykin, the Supreme Court was tasked with determining whether a contract clause that required an insurance company to pay out claims within sixty days of receiving notice from the insured was enforceable. The majority opinion held that such a clause could not be enforced because it violated public policy by allowing insurers to avoid their obligations without any legal consequence. Justice Field dissented, arguing that contracts should be interpreted according to their plain language and intent as expressed in writing by both parties at the time of formation. He argued further that if one party wished for additional protection beyond what is written in the contract, they should have negotiated for it prior to signing or included specific provisions regarding payment timelines into the agreement itself. In his view, enforcing contractual terms as written would promote fairness and encourage people to enter into agreements knowing exactly what rights and responsibilities each party had agreed upon beforehand.