Does the marriage contract become legitimate after proposing to the girl's family and fulfilling all its conditions, which are known to the suitor and the betrothed but not known to the guardian due to his lack of knowledge of the fundamentals of religion?

A contract is legitimate if it is conducted according to its controls, conditions, and pillars, and if its impediments are absent. The guardian's ignorance of this does not affect it. Rather, what is essential is his offer of marriage to the groom, the groom's acceptance, and the presence of witnesses. The mere proposal of the suitor and the acceptance of his proposal are not sufficient, as this is merely a promise of marriage and not a contract.