Kuwait Court of Cassation principle number 1164

The rule of unjust enrichment. Among the conditions for its application: the absence of a lawful cause justifying the enrichment and impoverishment. - Cause is the legal source conferring the enrichment. It may be a contract or a rule of law. The existence of a lawful cause. A bar to recourse against the enriched person by an enrichment action, because the enriched person has been enriched for a legal cause. Its implication. Establishment of the acquisition of ownership of the land by operation of law. A bar to recourse against the owner by an unjust enrichment action. Contravention thereof. Contravention of what is established in the papers and an error in the application of the law necessitating cassation of the challenged judgment. 12- Evidence in the action:-