Callanan v. Hurley was a United States Supreme Court case that addressed the issue of whether a state court had the authority to enforce a contract between two parties that was made in another state. The case involved a contract between two parties, Callanan and Hurley, in which Hurley agreed to pay Callanan a certain amount of money for the sale of a piece of property. Hurley failed to make the payment, and Callanan sued in a state court in New York. Hurley argued that the state court did not have the authority to enforce the contract because it was made in another state. The Supreme Court held that the state court did have the authority to enforce the contract. The Court reasoned that the contract was valid and enforceable under the Full Faith and Credit Clause of the United States Constitution. The Court noted that the Full Faith and Credit Clause requires that the courts of one state give full faith and credit to the public acts, records, and judicial proceedings of another state. Therefore, the Court held that the state court had the authority to enforce the contract.

In Callanan v. Hurley, the United States Supreme Court was tasked with determining whether a party to an action could be held liable for damages caused by another person who had been hired as an independent contractor. The majority opinion found that the defendant in this case, Mr. Hurley, could not be held liable because he did not have control over the actions of his independent contractor and thus should not be responsible for any damage they may cause while performing their duties on behalf of Mr. Hurley's business interests. However, Justice Field dissented from this ruling and argued that under certain circumstances it would indeed be reasonable to hold parties accountable when harm is done by those whom they hire as contractors or agents even if there is no direct supervision involved in such arrangements. He reasoned that since these individuals are acting on behalf of someone else’s business interests then it stands to reason that some degree of responsibility must lie with them if something goes wrong during their performance of services related to said business interests; otherwise people will simply avoid taking responsibility for any potential harms caused by those working on their behalf which would ultimately lead to injustice being served upon innocent victims whose only recourse against negligent behavior would become severely limited due to lack of accountability among employers/principals hiring out such services through third-party contractors or agents