simulation

noun | \ ˌsim-yə-ˈlā-shən \ | sim·u·la·tion

1. : the act of simulating

2. : a contract that by mutual agreement does not express the true intent of the parties — see also counterletter — compare disguised donation at donation

   Note: Although a simulation does not have effect as between the parties, its lack of effect may not be asserted against third parties, such as creditors or bona fide purchasers, to avoid liability.