A premarital agreement is a contract entered into prior to the marriage. A postmarital agreement is drafted and entered into after the marriage ceremony but contains the same contractual elements as a prenuptial agreement. A properly drafted prenuptial or postnuptial agreement allows a couple to define how they will provide for each other and divide their property in the event that the relationship ends. Kansas adopted the Uniform Premarital Agreement Act in 1988. It generally provides that premarital agreements are valid and enforceable and will be followed even if challenged.