They should approach their pastor to try to resolve the situation.
When a Catholic marries a non-Catholic, must the non-Catholic promise to raise the children in the Catholic faith?
If a Catholic wishes to marry in a place outside the Catholic church, how can he or she be sure that the marriage is recognized by the Catholic Church as valid?
The local bishop can permit a wedding in another church, or in another suitable place, for a sufficient reason.
In a situation of true financial difficulty, couples can come to an agreement with their pastors so that true financial hardship will never prevent a Catholic marriage from taking place.
The Sacrament of Marriage between two baptized Catholics should normally be celebrated within Mass.For example, a Catholic seeks to marry a Baptist whose father is the pastor of the local Baptist church. In these circumstances, the bishop could permit the couple to marry in the Baptist church.The permission in these instances is called a “dispensation from canonical form.” If two Catholics or a Catholic and non-Catholic are married invalidly in the eyes of the church, what should they do about it?If the situation warrants it and the local bishop gives permission, a Nuptial Mass may be celebrated for a marriage between a Catholic and a baptized person who is not a Catholic, except that Communion is not given to the non-Catholic since the general law of the church does not allow it.In such instances, it is better to use the appropriate ritual for marriage outside Mass.In addition to meeting the criteria for a valid Catholic marriage (see question #3), the Catholic must seek permission from the local bishop to marry a non-Catholic.