Once the adoption has been approved, the agency transfers the infant from foster care (if used) to the adoptive parents. After the infant has spent a few weeks or months with the adoptive parents, a local judge formally and legally approves the adoption. The natural mother has until the final court hearing. The infant is then issued a second, amended certificate, sometimes stated to be a birth certificate, that states the adopting parents are the child's parents. This becomes the adopted person's permanent, legal "birth" certificate. In the post WWII era, laws were enacted which prevented both the adopted person and adoptive family from accessing the original, and the information given to them can be quite limited (though this has varied somewhat over the years, and from one agency to another). Originally, the sealed record laws were meant to keep information private from everyone except the 'parties to the action' (adoptee, adoptive parent, birthparent and agency). Over time, the laws were reinterpreted or rewritten to seal the information even from the involved parties.
In all adoption searches, it is uncommon to find both the birth mother and father at the same time. A separate search, if desired, can be done afterwards for the father. Since males seldom change their surnames, and the mother might have additional information, it is usually easier than the initial search for the birth mother. In many cases, adoptees are able to do this second search for their birth father by themselves (or they try before paying for assistance).