Convalidation and Radical Sanation of Marriage

In short, yes they would. In normal circumstances, Church law requires that they exchange consent anew in what is known as a “convalidation.” Here is a link to the relevant canon law, but I suggest you talk to your parish pastor and diocesan tribunal representatives for further direction.

If one spouse won’t go through with the exchange of consent because he or she thinks the original marriage was entered into validly, the other spouse can seek what is known as a “radical sanation” in which the exchange of consent (see CCC 1625ff.) is not formally required but is otherwise shown to exist on the part of both parties. Again, as above, check as needed further with your pastor and diocesan officials.