A quasi contract, also known as a constructive contract or an implied-in-law contract, is a legal concept used when a contract is not necessarily formed. This type of contract is often used in situations where one party has received a benefit from another party, but no formal agreement or contract was ever established.

A quasi contract is a legal remedy used to prevent an unjust enrichment of one party at the expense of another. This means that even though there may not be an actual contract in place, the court may still impose certain obligations on one or both parties involved in the situation.

To better understand this concept, let`s consider an example. Suppose you are at a restaurant with a group of friends. One of your friends forgets their wallet and you offer to pay for their meal. Your friend thanks you and promises to repay you later, but no agreement is ever made regarding when or how the repayment will occur.

Later on, your friend fails to repay you, despite their promise. In this scenario, you could potentially file a claim for a quasi contract. This is because your friend received a benefit (the free meal), and it would be unjust to allow them to keep that benefit without repaying you.

Another common example of a quasi contract is a situation where a contractor performs work on someone`s property without first obtaining a written contract. If the property owner benefits from the work but refuses to pay, the contractor may be able to file a claim for a quasi contract in order to recover payment.

In summary, a quasi contract is a legal remedy used when there is not a formal contract in place, but one party has received a benefit and it would be unjust to allow them to keep that benefit without compensating the other party. If you find yourself in a situation where you have provided a benefit to someone without a formal agreement, you may want to consider speaking with an attorney to determine if a quasi contract claim may be appropriate.