Which type of contract is specifically created to prevent unjust enrichment?

A quasi contract is specifically designed to prevent unjust enrichment in situations where one party benefits at the expense of another without a formal agreement. The law recognizes that it would be unjust for one party to retain a benefit without compensating the other party, even if no explicit contract exists. Quasi contracts allow for restitution, meaning the party receiving the benefit may be required to pay the other party for the value of what was received.

In contrast, valid contracts are agreements that are legally enforceable and do not inherently focus on preventing unjust enrichment. Contingent contracts depend on certain conditions being met but do not specifically aim to address scenarios of unjust enrichment. Breach of contracts refers to the failure to fulfill a contractual obligation and also does not serve the primary purpose of preventing unjust enrichment. Thus, the design of quasi contracts directly relates to balancing fairness and equity in situations lacking traditional contractual agreements.