Assuming that your daughter is a minor, if you are changing her name through the courts you will have to give him notice and an opportunity to object to the name change. If you are changing her name by common law right (does not involve court process) then you do not have to notify her father.
Assuming that your daughter is a minor, if you are changing her name through the courts you will have to give him notice and an opportunity to object to the name change. If you are changing her name by common law right (does not involve court process) then you do not have to notify her father.