What distinguishes an implied-in-law, or quasi-contract?

An implied-in-law contract, or quasi-contract, is recognized in situations where one party benefits at the expense of another, leading to an unfair advantage. The law intervenes to prevent unjust enrichment, obligating the benefited party to compensate the other, despite the absence of a formal or explicit agreement between the parties. This legal construct is aimed at ensuring fairness and equity, rather than enforcing a mutual intention to create a contract or detailing specific terms.

For instance, if someone receives emergency medical care while unconscious and does not have the capacity to consent or agree to pay for the services, the medical provider may still seek compensation based on the principle of unjust enrichment. The provider conferred a benefit to the individual, who, despite lack of a mutual agreement, would be expected to compensate for the services received. This illustrates why recognizing the unjust enrichment aspect is crucial in distinguishing quasi-contractual situations from traditional contracts.