What is the legal ruling concerning a fiancée who requests annulment of the engagement and marriage after the marriage contract has been concluded, without a legitimate Sharia reason, and must she return the expenses incurred, and is it permissible for the groom to receive compensation in restoration of his dignity?

As long as you have entered into a valid marriage contract with her, her marital bond is in your hands. Neither she nor her guardian has the right to force you to separate from her. You have the option to divorce her in exchange for the return of the dowry you paid and any other expenses, or to keep her marital bond in your hands.

If you choose to divorce her before consummation, she is entitled to half of the named dowry. As for gifts and expenses, the correct approach is to refer to the prevailing custom in your country, unless there is a condition that contradicts the custom. If people customarily agree that they are to be returned to the husband, then that custom is followed, and vice versa.

It is stated in Manh al-Jalil: A man has the right to reclaim what he spent on a woman if the aversion and refusal came from her. However, if the impossibility came from him, he has no right to reclaim anything from her. This is unless there was a condition or custom regarding reclamation, in which case it is acted upon by agreement.