What is an implied-in-law contract also known as?

An implied-in-law contract is also known as a quasi contract. This type of contract is not an actual contract formed through mutual agreement or the exchange of promises, but rather a legal construct created by courts to prevent unjust enrichment to one party at the expense of another. The court imposes an obligation in the absence of a formal agreement to ensure fairness and justice.

Quasi contracts arise in situations where one party has benefited from another's actions or services, and it would be inequitable for the benefitting party to retain that benefit without compensating the other party. For example, if a person receives medical treatment in an emergency situation and is unable to agree to payment due to their condition, the court may impose a quasi contract requiring the beneficiary to pay for the medical services to avoid unjust enrichment.

Understanding the concept of quasi contracts is essential as they highlight important legal principles around fairness and equitable treatment in the absence of a consensual agreement. This distinguishes them from other types of contracts, such as formal contracts, oral contracts, or binding promises, which have different characteristics and legal implications.