The article presents an analysis of the marriage law system in Poland. It reflects on the possibility to recognize the verdicts of the Bishop’s Court pronouncing on behalf of the Catholic Church, which enjoys subjectivity in international law as the Holy See. The aim of the article is to encourage consideration of the possibility of the reception of a judgment of the Episcopal Court as evidence allowing the erasure of a marriage from the register of the Registry Office. Currently practiced, the concept of separation of legal orders cannot ignore the division of powers and disregard the authority to pronounce a marriage. The Catholic Church in Poland, in particular the canonists, have a duty to revise their own position in order to eliminate the disorder. In this context the considerations concern the essence of the principle of bilateralism of the concordat agreement, its sense. A lack of publications, especially of canonists acting as defenders of the matrimonial knot is astonishing. For it expresses a total lack of reflection and discernment that precisely on the civil field the institution of marriage is being violated. Lack of validity of a civil divorce in the legal sense, as understood by the Church, directly proves that the Church realizes that divorces do not make sense on the grounds of the system of concordat law concerning adjudication on marriage. Therefore, one cannot justify the passivity of canonists towards proceedings, in which a civil court acts without jurisdiction. It seems necessary to revise the approach to the system of law in order to eliminate the irregularities. The aim is, in fact, only such a procedure which will make it possible to pronounce the invalidity of marriage in a correct way, producing effects also in civil law through the civil court and proper recognition of the judgments of the episcopal court.