1713.How do you prove a legal adoption?
You can prove the legal adoption of a child by an amended birth certificate issued as the result of an adoption. If the date of a U.S. adoption is material, it may be proved by:
Records of the court that granted the adoption;
Official notice you received as the adopting parent(s);
Records of the State's Attorney or child welfare division; or
The adoption decree (if you have it and voluntarily submit it).