What characterizes this kind of obligation is the fact that its efficacy or obligatory force (as distinguished from its demandability) is subordinate to the happening of a future and uncertain event. It follows that if the suspensive condition does not take place and it is certain that it will not be fulfilled, the parties would stand as if the conditional obligation had never existed. During the pendency of the suspension condition, the creditor has only a mere hope or expectancy of acquiring a right. (part 1. Art 1188)