880. The prenuptial guarantees required by church law in case of mixed or other dangerous marriages are as follows: (a) According to the Code, no dispensation for mixed marriages will be granted unless the non-Catholic party gives a guarantee that the danger of perversion for the Catholic party shall be removed, and both parties promise that all the children shall be baptized and brought up only in the Catholic faith. There must be moral certainty that the promises will be kept, and as a rule they should be demanded in writing (Canons 1061, 1071). The permission for marriage with fallen-away Catholics is not granted until the Ordinary has satisfied himself that the danger to the Catholic and the children has been removed (Canon 1065, Sec.2). (b) The pre-Code legislation further required that both parties promise that there would be no non-Catholic ceremony and that the Catholic promise to work for the conversion of the other party. Canons 1062-1063 speak of these obligations, but do not exact promises. 881. Remedies against mixed and other dangerous marriages are the following: (a) Before engagement Catholics should be instructed and encouraged to marry those of their own faith. Thus, confessors can discourage company-keeping with non-Catholics, parents can provide their children with opportunities for meeting suitable Catholics, and, above all, pastors should frequently speak and preach to old and young on the evils of mixed marriages. (b) After engagement to a non-Catholic has been made, the non-Catholic should be persuaded to accept the Catholic religion, if he or she can do this with sincerity; otherwise, the Catholic should be warned of the danger of the marriage, and the pastor should refuse to seek a dispensation unless there is a really serious cause (see Canon 1064; II Plenary Council of Baltimore, n. 336; III Plenary Council of Baltimore, n. 133). 882. Dangerous Communication.--Mixed marriages are mentioned specially among the communications with non-Catholic that are dangerous to faith, because marriage is a lifelong and intimate association. But there are other communications with unbelievers that can easily corrupt faith, the less dangerous being communication in matters that are not religious, and the more dangerous being communication in religious matters. (a) Non-religious or civil communication is association with non-Catholics in secular affairs, such as business, social life, education, politics. (b) Religious communication is association with non-Catholics in sacred services or divine worship.