This document discusses contingent contracts. It defines contingent contracts as contracts where the promisor's obligation depends on certain conditions being met, such as the occurrence or non-occurrence of a future uncertain event. Examples of contingent contracts include contracts of insurance, indemnity, and guarantee. The document outlines the key characteristics of contingent contracts, including that their performance depends on a contingency and the event must be collateral. It also discusses when contingent contracts become void, such as if the contingent event becomes impossible. Finally, it compares contingent contracts to wagering agreements, noting the differences between the two.