[FUNNYY]

I would really like to know to if the grown child could sue the estate or will be estate of the biological father ie family because she's legaly his,

[ScottGem]

First its not a good idea to piggyback your question on someone else's. This can lead to confusion. You should start a new thread. So I've moved your question to its own thread.

Also no need to shout at us.

If there was a will and you were not mentioned, you may have a cause of action against the estate for your share. If there was no will you can submit a claim to the estate for your share.

You will have to prove paternity,

[Synnen]

I would like to add that if you were legally adopted, you may have absolutely ZERO legal connection to a biological parent, and therefore would have no rights to his estate.