Child Support

What matters is who the father is, not whose name is on the birth certificate. SHE has the decision what last name to use. He has no input. You don't need connections and what kind of person she is doesn't matter. It's her choice.

Yes, if it is his child it's his responsibility to support the child AFTER there is DNA proof that it is his child.

the point is that the name was CHANGED without his consent, yes, the type of person she is does matter because there is the probability that it isn't his. That system is totally messed up anyway, just because she actually gave birth doesn't make the child any more hers than his so there should be equal input. No DNA testing and I never implied that it wasn't his responsibility; just curious as to wether or not the law states that he HAS to pay; not if he SHOULD.

If the child is his, and she asks for support, she'll get it. I don't know where you are getting your information from but it is not correct. A hospital doesn't prepare a BC, it passes on the information of the birth along with the paperwork the MOTHER fills out to the department of vital records. They then then prepare the BC. The mother can name the child whatever she wants to, and there is absolutely no requirement that the child be named after the father. In some states, there is even a window in which a name on a birth certificate can be altered without a court order. I say all of that to place emphasis on the fact that she has the right to choose the last name, and that no fraud was committed by her not choosing his.

Furthermore, if they were married at the time the child was born, he is the legal father, and there are limitations that vary by state as to how long he can contest that if there is any doubt.

I missed that you were in Ohio. Here is the relevant law section. The emphasis is mine.

(F)(1) If the mother of a child was married at the time of either conception or birth or between conception and birth, the child shall be registered in the surname designated by the mother, and the name of the husband shall be entered on the certificate as the father of the child. The presumption of paternity shall be in accordance with section 3111.03 of the Revised Code.

You said her last name was put on the birth certificate. You said nothing about CHANGING the birth certificate. You referred to the type of person she is in connection with the hospital and the birth certificate, not in connection with anything else.

Yes, the State law says he HAS to pay if it's his child. Why would you think it's not his responsibility, name on the birth certificate or not?

I don't understand your attitude. You asked. I answered according to law and a lot of years of experience.

Right - it's the mother's decision. The type of person she is and her connections do not matter. Unfortunately, OP has now come back and stated that the "ex" CHANGED the name on the bc so ...

Have no idea of the status between bf and "ex" when child was conceived and born. That would be helpful.

She mentioned that the child was from a previous marriage in the question, so I answered with the presumption that that child was a product of the marriage.

Right. I'm not really sure because they were married (?) but he doesn't know if his name is on the birth certificate. Only OP knows.

I think she doesn't know, and he hasn't been forthcoming about it. Although, if they were married, there should have been a child support order somewhere in that divorce. There is a lot here that is unclear, and we are hearing it from a third party that wasn't involved in any of it.

JAM, you have seen the questions that we have asked and the information that we have had to speculate on because we don't have the facts from you. Please come back and clarify.