Does a divorce issued by a husband with the words "you are divorced" take effect after his wife threatened to expose him?

A divorce issued by the husband is considered irrevocable (bain), unless certain conditions are met, such as the marriage contract being deemed valid by someone who is qualified for taqlid (following a qualified scholar's opinion). In that case, the marriage is considered valid and the divorce revocable (raj'i), as long as it was not in exchange for khul' (divorce at the wife's instance with compensation) or by triple pronouncement. This divorce has occurred, and the disagreement among scholars is whether it is irrevocable or revocable. It is recommended not to take matters of marriage and divorce lightly, and to refer to the Sharia court to resolve the dispute.