If the disclosure was not signed, the identity of the birth parents named on the birth certificate, including birth dates, last known addresses and birth places may be found. (chlss.org)
For parents this is easy, but teachers might want to make the effort of learning parent names. (qaeducation.co.uk)
But if both parents die and a minor child is named as a contingent beneficiary, or if a single parent names a child as a beneficiary, matters can get complicated. (nytimes.com)