Re: Changing Name to My Fiance's Last Name
you ask the child's father if it is ok. Once you have his permission, you file for a name change in court.
If you cannot get his permission, it will be much more difficult but it is unlikely the courts will allow you to change it to your fiance's name since it has no benefit for the child and actually makes it appear he is the father when he is not. Some folks here call that a back door adoption. It is frowned upon by the courts.
I am not an attorney and any advice is not to be construed as legal advice. You might even want to ignore my advice. Actually, there are plenty of real attorneys that you might want to ignore as well.