Quasi-contract is a legal obligation that can be executed resembling a contract
agreement. This obligation is used by the Common Law courts to prevent
situations in the form of unjust enrichment. It can be distinguished from the
contract. The purpose of this study is to know the legal view of the Indonesian’s
Law of Obligation on the concept of Quasi Contract. This research was conducted
by using normative method and using primary, secondary and tertiary legal
material, the data was taken using literature study. The results show that though
Indonesia as a Civil Law country does not recognize this term and Civil Code
did’nt explicitly formulaze the concept of Unjustment Enrichment, but there is a
similar view to the concept contained in the Quasi Contract that may occur in
situations that result in Quasi Contract obligations such as money paid by someone
who had intervied in affairs of another person could be recover (article 1354 of the Civil
Code) and money paid by mistake could recover through an action called solutio indebiti
(article 1359 of the Civil Code).