Kuwait Court of Cassation principle number 3655

Default interest, whether statutory or contractual. Its prerequisite. The debt whose payment the debtor has delayed must arise from a commercial obligation or act. The debt being civil. Its effect. Interest may not be claimed on it, and every agreement thereon is void. This concerns public policy. A judgment contrary to this. Requires its cassation for violation of the law. Example concerning a claim for equivalent performance arising from unjust enrichment.