Kuwait Court of Cassation principle number 1139

Simulation of the cause does not entail simulation of the obligation; the matter depends on the concealed cause. Absence or unlawfulness of the concealed cause. Its consequence. Nullity of the obligation. - 245 - Obligation - A lawful cause is presumed for an obligation until evidence to the contrary is established, and the burden of proving absence or unlawfulness of the cause falls on whoever alleges it.