Pure and Conditional Obligations

A pure obligation is one where its performance of does not depend upon a future or uncertain event, or upon a past event unknown to the parties, resulting in such obligation being immediately due and demandable.

As a sub-set of a pure obligation, a reciprocal obligation is one which arise from the same cause, and which each party is a debtor and a creditor of the other, such that the obligation of one is dependent upon the obligation of the other. Necessarily, the performance of each reciprocal obligation is conditioned upon the simultaneous completion of the other. Hence, both obligations must be performed at the same time.

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