Does the father of a child that is born out of wedlock have to get the mother's consent before legitimation the child and if they do it what happens?

Legitimation is the process required if the father wants to have visitation rights with the child. The mother does not have to consent to the process, but it makes it easier if she does. If she consents, the paperwork can be done in a fairly rapid manner and all parties can work together to create a visitation schedule that works. If she does not consent, a dna test will be ordered and provided that it is conclusive, a judge will order visitation.  You need to contact a local attorney to get the process started. It is not something I would recommend you try to file on your own.