If a divorce is made conditional upon the actions of another person, and he does it by mistake

He divorced his fourth wife and wants to marry another; should he wait until her ‘iddah ends?

He authorized her to get divorced and she got divorced herself

She asked for divorce and he said: “If this is really what you want in your heart then it is as you wish”

He divorced his wife thrice and he wants to take her back

She is asking for a divorce for no reason. Can he take back the mahr?

She left her husband’s home, and her lover asked her to marry him when she was still married!

He imagined that his wife was standing in front of him and he spoke to her in a way that he fears constitutes a divorce

What if the wife claims that he divorced her but he denies it or forgot it?

He thought about divorcing his wife and uttered the words to himself in a low voice