My name is Samantha and I want to know how can I find out if my father Ruben had me on his insurance because my dads new wife received insurance money for her and my step sister and brother and I'm the oldest but from a different mom.

Do you mean life insurance, and he died?
I'm very sorry.
The insurance company would write separate checks and send them to each beneficiary named by him on the policy.
I suppose it's possible that there is a check out there for you, but you can't find out if his wife won't be helpful. Have you asked? How long ago did he marry her?

If you were the beneficiary of his insurance, they would have contacted you. It doesn't sound like they wouldn't have known where to contact you.

There is no way we can tell you.

If you were listed on the policy they will try to contact you. If you know the company you can contact them.