Under Section 16 of the Hindu Adoptions and Maintenance Act, 1956, a registered document relating to…

Under section 16, when a registered document recording an adoption and signed by the person giving and the person taking the child is produced, "the court shall presume that the adoption has been made after complying with the provisions of this Act unless and until it is disproved". The presumption is rebuttable, so the document is not conclusive proof.