It's the date of birth.
There is no way of linking the adoption certificate to the original birth certificate.
Not strictly correct, it can be done if enough information is know or suspected. I have three birth certificates for an adopted person.
The first given to me by the adopted person is the short certificate given after adoption.
This contains the adopted name, correct date of birth and the county of birth of the person.The second is a birth certificate given to me by the mother's sister, which
states Adopted and gives the superintendent registrars signature. This also gives all the usual details found on a birth certificate but on this particular certificate no father's name (i.e. they were not married and the father not present on registration). It also contains the name the mother gave the child at birth.The third a modern certificate from the Adopted Children Register in the adopted name of the child.
This has 8 columns giving Number of Entry : Date & County of Birth : Name & Surname of Child : Sex : Name and Surname, address & occupation of the adopter or adopters : Date of Adoption Order & Description of Court by which made : Date of Entry : Signature of Officer Deputed by Registrar General to Attest the entry.Assumptions do have to be made but depending on what is known linking the original birth certificate with the adopted persons certificate the link can be made, but this is also true with locating any certificate we have to make assumptions based on what we know.
Cheers
Guy
