Merrill v. Petty was a United States Supreme Court case that was decided in 1872. The case involved a dispute between two parties over the ownership of a piece of land in the state of Arkansas. The plaintiff, Merrill, claimed that he had purchased the land from the defendant, Petty, and that Petty had failed to deliver the deed to the land. Petty argued that he had never sold the land to Merrill and that he was still the rightful owner. The Supreme Court ultimately sided with Merrill, ruling that Petty had indeed sold the land to Merrill and that Petty was obligated to deliver the deed. The Court held that Petty had made a valid contract with Merrill and that he was legally bound to fulfill his obligations under the contract. The Court also held that Petty was not entitled to any compensation for the land, as he had already received payment from Merrill. This ruling established that a contract is binding even if the deed is not delivered, and that a party who fails to fulfill their obligations under a contract is not entitled to any compensation.

In the case of Merrill v. Petty, the Supreme Court was tasked with deciding whether a state court had jurisdiction to hear an action brought by a citizen of another state against citizens of that same other state. The majority opinion held that it did not have such jurisdiction and dismissed the appeal. However, Justice Field dissented from this decision, arguing that Congress had granted states broad authority over civil matters involving non-residents in order to protect their own citizens from being sued in foreign courts without due process protections or access to justice. He further argued that if states were denied this power then they would be unable to provide adequate protection for their own citizens who may find themselves subject to litigation outside their home jurisdictions. Furthermore, he noted that denying states this power could lead them into conflict with each other as well as potentially violate constitutional principles related to interstate commerce and equal protection under the law for all persons regardless of citizenship status or residence location.