In this type of contract, the elements are not specifically written or expressed. In fact, this type of contract is used as a remedy in a situation when one party to the quasi-agreement received unjust enrichment resulting from not paying for a product or service rendered.
A Drupe is a single fleshy fruit with a hard stone which contains the single seed. This is a Cherry (Prunus avium). Other fruits of this type are: Apricot (Prunus armeniaca), Plum (Prunus x domestica), Coconut (Cocos nucifera), Olive (Olea europaea), Peach (Prunus persica), Sloe (Prunus spinosa).
the fruit of any of various trees belonging to the genus Prunus, of the rose family, consisting of a pulpy, globular drupe enclosing a one-seeded smooth stone. the tree bearing such a fruit. the wood of such a tree. any of various fruits or plants resembling the cherry. bright red; cerise.