What is the ruling on a woman marrying a man born of zina (illegitimate sexual intercourse) after she becomes aware of that, and is the marriage contract annulled for not informing her beforehand?

There is no obligation upon a person of severed lineage to inform a prospective spouse of their condition. This does not affect the validity of the marriage contract if it fulfills its conditions and pillars.

The right to annulment is not established by such a matter; rather, it is established by defects that prevent intercourse or by repulsive and contagious diseases.

Furthermore, this matter does not impair equality [in marriage], for the preponderant opinion is that what is considered in equality between spouses is religion.