Because there are many reasons why a marriage may lack one or more of the basic elements of a binding marriage, it is not possible here to list and explain them all. However, many correspond to at least one of the following questions:
Was the marriage ceremony legally acceptable to the Catholic Church?
Were both spouses free to marry each other?
Was each spouse adequately prepared to understand, accept and fulfill the rights and obligations of marriage?
Did each spouse intend to accept and fulfill what, in the Church's tradition, has been taught as God's plan for marriage?
If a person can honestly answer "No" to one or more of these questions as it applies to his/her marriage on their wedding day, then it is possible that some grounds for declaration of nullity exist.