What is the ruling of Islamic law on how to take back a second wife after she has been divorced three times, noting that the third divorce was carried out by a registrar without uttering the divorce, and that some of these divorces occurred while she was menstruating or were a threat?

Your wife was divorced from you by three pronouncements: the first and second pronouncements are valid, while the pronouncement of divorce written by the ma'dhun (authorized official) without intention is not valid. The pronouncement of divorce during menstruation is valid according to the majority of scholars. Thus, she has become irrevocably divorced from you ( baynunah kubra ), and she is not lawful for you until she marries another husband. It is necessary to draw attention to the invalidity of tahlil (making a divorced woman lawful for her former husband through a temporary marriage with another man), the impermissibility of abortion, and the error of the saying "She has no one but Allah and me," the correct phrasing being "but Allah, then me."