Birth parents , Adoptees, and siblings, can sign up with the NY state information REgistry.

Birth parents can update important medical information. The adoptee can to contact the registry to see if anything has been updated.
Birth parents can sign up with the state registry to be reunited. There are three forms:
How do I register?

If you want to register, you must submit an application. The application must be signed and notarized.

To request an application, write to:

Adoption Information Registry
New York State Department of Health
P.O. Box 2602
Albany, NY 12220-2602
**Please be certain to include your name, mailing address and the type of application you need (i.e., adoptee, birth parent or biological sibling).

If you prefer, you can download your application as a PDF document from the choices listed below:

Adoptee Registration Form (pdf, 651 kb, 2 pp.)
Birth Parent Registration Form (pdf, 18 kb, 2 pp.)
Biological Sibling Registration Form (pdf, 19 kb, 2 pp.)

the Link for the state site: http://www.health.ny.gov/vital_records/adoption.htm