You and your partner are in love and plan to marry. You may be thinking about asking your partner to agree to a prenuptial agreement, also called a prenup. You may be asked to sign a prenuptial agreement. A prenuptial agreement is a legal contract between you and your intended spouse to determine what happens in the event of a divorce. A divorce is the end of a marriage. Prenuptial agreements require each person to disclose all money, property and assets owned.