Im 21 and I want my potential father to take a DNA test but he doesn't want to. When I was conceived they were married but he told the lady he's married to now it was just for his papers. He lives in Fl now and believes that by taking the test it is proving that there is a possibility that I can be his daughter. He denies me to the max even to the point that my little sister has my name, like I never born. I want to know my medical history from his side cause I don't have a clue. Is there a way I can legally make him take a test? Im Desperate!!

In some circumstances, yes, you can get a Court Order forcing a person to submit to DNA. I've never seen it ordered unless it has been (literally) a matter of life and death, when medical history is vital.

I'm confused. If he was married to your mother when you were conceived, he is your legal father. He has a second family and that daughter has your same first name?

When your mother filed for child support DNA would have been ordered.

Why do you have a sense of desperation? Is something else going on?

Maybe DNA wasn't ordered because the parents were married and support was part of the divorce agreement alone?

mcmia89, why are you desperate, will you say here?
If you can get his father to offer DNA, or a brother of his who has the same father, that might help, but it won't hold up in court.

Many a father denies his child because the mother, in a moment of anger or jealousy, says the child isn't his. There are many reasons that have nothing to do with you. I hope you can talk to your mother, if she is alive.

I see no grounds for compelling him to submit. But, as noted if he was married to your mother at the time of conception then he is your legal father unless a court ruled otherwise.