Explain the term ‘Quasi Contracts’ and state their characteristics.

Quasi Contracts: Under certain special circumstances, obligations resembling those created by a contract are imposed by law although the parties have never entered into a contract. Such obligations imposed by law are referred to as ‘Quasi -contracts’. Such a contract resembles a contract so far as result or effect is concerned but it has little or no affinity with a contract in respect of mode of creation. These contracts are based on the doctrine that a person shall not be allowed to enrich himself unjustly at the expense of another. The salient features of a quasi -contract are: