I think the only way that can be done now is by way of adoption which is a simple process that requires the consent of your spouse if any. This is known as an adult adoption and there is no investigation by the court as to you being a "good" prospective parent. The adoption decree orders the state Dept of Health to change her birth certificate to name you as the father. There are no legal consequences other than inheritance rights if you die without a will.
Answered on Nov 08th, 2013 at 5:15 PM