Divorce Under Duress

Question: A woman wants a divorce, but the husband refuses to issue it. Her family then ganged up on him and forced to him to write a divorce, which he did for fear of his life Is the divorce effective?

Answer: A divorce written in duress will not be effective as long as the man did not verbally utter the divorce And Allaah knows best what is most correct.

Fatawa Rahimiyyah vol.3