Question: What is the position of a girl who is baalighah makes nikaah with someone who is of her (kufuw) standard without the permission of her waly? Can the waly make faskh of the nikaah?
If the nikaah was made on mehr mithal, then the waly cannot make faskh. This is the Hanify view.
Fataawah Mahmoodiyah Vol 17 pg 125