Explanation:

When one or more of the pre-requisites to a valid marriage mentioned above are not fulfilled by the spouses before marriage, the marriage is void and not binding. The following are certain situations in which a Muslim marriage is void. 1. When a marriage takes place between persons who are absolutely incapable. 2. When a person marries to the wife of another man when the marriage of the lady was subsisting. 3. Marrying more than four wives. In such a case, the fifth marriage and so on becomes void. 4. Marriage with a Non-Muslim.