Is Marriage Valid without Mahr?

Who Decides Mahr?

It is not permissible to marry without a mahr (dowry)

What was written in the list of movable items but not actually bought is regarded as part of the deferred dowry

He divorced her before consummating the marriage and after being alone with her, and he did not specify any dowry for her

Ruling on regarding the list of furniture and movable goods as part of the mahr (dowry)

He divorced her before consummating the marriage, and he had given her cash, a jewellery set and other gifts, and had written down the deferred portion of the mahr. What is he entitled to take back?

He gave his fiancée money to buy gold as a mahr, then the engagement was annulled

Is it valid for her mahr to be that her husband should memorize the Holy Qur’an?

Paying the deferred portion of the mahr before it is due