The National Adoption Registry, now called The National Foster Care & Adoption Directory, is a directory service that helps parents or adoptees search for their birth parents, children or siblings. The National Adoption Registry is voluntary and requires both parties to register.
The National Foster Care & Adoption Directory uses an algorithm to find possible matches, as adopted children are often located far from their birthplace. The directory states that it thoroughly investigates any potential matches before initiating contact between the two parties, but after this initial contact, it does not continue facilitating communication. Each state and country has its own adoption record-keeping process, and the directory aims to help these various processes work together.