No, I believe it isn't mandatory, it is voluntary. You may check with an attorney because the only reason why after so many years somebody would care about the adoption is if there is a disability, an inheritance dispute or something of that sort.
Either way, good luck and check into everything depending in the circumstances surrounding your posting. Now, I am curious why would it matter after so many years?
at 7:05 PM on Jun. 12, 2009