Probably none, but it depends on how he did it. If he just titled everything jointly, your only hope would be to prove that the adopted child exerted undue influence. If it was by will, if he forgot to name you as his child, then you may have rights as a pretermitted heir. On the other hand if he said, "X is my child and I give him nothing," then that is what you will get.
Answered on Mar 14th, 2013 at 1:31 PM