Fosdick v. Schall was a United States Supreme Court case that dealt with the issue of whether a contract between two parties was valid. The case involved a contract between the plaintiff, Fosdick, and the defendant, Schall, in which Fosdick agreed to pay Schall a certain amount of money in exchange for Schall's promise to perform certain services. The Supreme Court held that the contract was valid and enforceable. The Court reasoned that the contract was supported by consideration, meaning that both parties had given something of value in exchange for the other's promise. The Court also noted that the contract was not against public policy, as it did not involve any illegal activity. The Court also held that the contract was not voidable due to any lack of capacity on the part of either party. The Court noted that both parties were of sound mind and had the capacity to enter into a contract. In conclusion, the Supreme Court held that the contract between Fosdick and Schall was valid and enforceable. The Court found that the contract was supported by consideration, was not against public policy, and was not voidable due to any lack of capacity on the part of either party.

In Fosdick v. Schall, the Supreme Court was asked to decide whether a contract between two parties that had been partially performed could be enforced by either party in court. The majority opinion held that such contracts were enforceable and allowed for recovery of damages if one party failed to fulfill their obligations under the agreement. However, Justice Field dissented from this opinion, arguing that it would lead to injustice as it would allow parties who have already received some benefit from an agreement to sue for more than they are entitled when only partial performance has occurred. He argued further that allowing such suits would encourage people not to perform their contractual duties fully or honestly since they could still recover something even if they did not complete all of their obligations under the contract.