You did not mention a state, and of course it is state law that applies here. But the birth certificate is not necessarily “invalid.” Assuming the woman was born in the state specified in the birth certificate on the day provided by the certificate then the only error on the birth certificate is the identification of the mother (and perhaps father, if one was stated in the certificate). Thus, the only thing that might be nullified here is the identification of who her mother is. As she is an adult now, that really only affects her when it comes to inheritance by intestacy. It certainly won’t invalidate her marriage, render her medical degree or medical license invalid, etc.

