Art. 2142. Certain lawful, voluntary and unilateral acts give rise to the juridical relation of quasi-contract to the end that no one shall be unjustly enriched or benefited at the expense of another. (n)
From the above legal precept, quasi-contracts give rise to an obligation so that no one will be unjustly enriched or benefited at the expense of another. There are two kinds of quasi-contracts: a) solutio indebiti; and b) negotiorum gestio. There is solutio indebiti if something is received when there is no right to demand it, and it was unduly delivered through mistake.[1] On the other hand, negotiorum gestio exists when someone voluntarily takes charge of the agency or management of the business or property of another and without any power from the latter.[2][1] Art. 2154, NCC.
[2] Art. 2144, NCC.