All states allow an adoptive parents access to non-identifying information of an adoptee who is still a minor. Nearly all states allow the adoptee, upon reaching adulthood, access to non-identifying information about their relatives. Approximately 27 states allow biological parents access to non-identifying information. In addition many states give such access to adult siblings. Identifying information is any data that may lead to the positive identification of an adoptee, biological parents, or other relatives. Nearly all states permit the release of identifying information when the person whose information is sought has consented to the release. Many states ask biological parents to specify at the time of consent or surrender whether they are willing to have their identity disclosed to the adoptee when he or she is age 18 or 21.5. If consent is not on file, the information may not be released without a court order documenting good cause to release the information. A person seeking a court order must be able to demonstrate by clear and convincing evidence that there is a compelling reason for disclosure that outweighs maintaining the confidentiality of a party to an adoption.[24] In Alabama, Alaska, Delaware, Kansas, New Hampshire, and Oregon, there is no requirement to document good cause in order to access their birth certificates.[25][26][27][28] Some groups, such as Bastard Nation, One Voice,[29] and Origins USA,[30] campaign for adoptees' automatic access to birth certificates in other US states.

Most open adoptions lie somewhere in the middle, according to Grotevant and McRoy, exchanging letters, pictures, and phone calls, and having face-to-face meetings once or twice a year. Whatever their situation, many families report that relatives and friends condemn openness, and voice fears that the arrangement will make the birth parent want the child back.