Dryfoos v. Wiese was a United States Supreme Court case that dealt with the issue of whether a state court could enforce a contract that was made in another state. The case involved two parties, Dryfoos and Wiese, who had entered into a contract in the state of New York. The contract stated that Wiese would pay Dryfoos a certain amount of money for the sale of certain goods. Wiese failed to pay the money as agreed, and Dryfoos sued in a state court in Pennsylvania. The court ruled in favor of Dryfoos, and Wiese appealed the decision to the Supreme Court. The Supreme Court held that the state court in Pennsylvania had the authority to enforce the contract that was made in New York. The Court reasoned that the contract was valid and enforceable in both states, and that the state court in Pennsylvania had the authority to enforce it. The Court also noted that the contract was not in violation of any public policy of either state. The Court's decision in Dryfoos v. Wiese established that a state court can enforce a contract that was made in another state, provided that the contract is valid and enforceable in both states and does not violate any public policy of either state. This decision has been cited in numerous cases since then, and has been used to support the enforcement of contracts made in other states.

In Dryfoos v. Wiese, the Supreme Court was tasked with deciding whether a contract between two parties that had been partially performed could be enforced by one of them against the other. The majority opinion held that it could not, as there were no mutual obligations left to enforce and thus no consideration for either party. Justice Field dissented from this decision on the grounds that partial performance should be sufficient consideration in such cases if both parties have received some benefit from their agreement. He argued that when one party has already provided something of value under an agreement, they should be able to rely on its enforcement even if all terms have not yet been fulfilled; otherwise, contracts would become unenforceable after only partial performance and agreements would never reach completion due to lack of incentive for either side to fulfill their end of the bargain.