The process  of nullity  of marriage:

The causes of nullity of marriage, in canon law, are often the subject of widespread misinformation, sometimes as the result of ignorance, sometimes caused by bad faith. “Urban legends” whose reliability is equal to or lower than those about whites crocodiles in the sewers of New York, reserve the causes of nullity of marriage solely for the offspring of royal families or for the VIPs. The costs, according to this “black legend” would be prohibitive, the duration totally inadequate, the outcome for granted “as long as you pay.”

None of this is true.

The ambiguity, however, often arise from the comparison with the civil judgments of separation and divorce. In the case of a joint application for separation or divorce, the Civil Court is limited to taking note of the conditions agreed between the spouses and approve, if considered appropriate and adapted to the spouse and any children born in marriage. The cause of nullity of marriage in canon forum, however, requires to ensure the true invalidity of marriage, with the need for a full inquiry and review, in essence, the affair of marriage as a whole. Times, modes and judicial activity are different. Obviously, this refers specifically only to the trial stage, not at what is behind it, as often separations and divorces, even if consensual, are the result of an intense and laborious preparation of court.