In relation to adoption records, there is no automatic release of birth or other information. However, individuals can apply to the agency that holds their records for their own information. There is no automatic access to personal information relating to other individuals, which would include a sibling placed for adoption, as data protection provisions apply.
The Adoption Authority of Ireland operates the National Adoption Contact Preference Register (NACPR). The NACPR was set up in 2005 as a way for people affected by adoption to make their wishes known about having contact with their birth family members. Where a match is made on the register between two people seeking contact (including siblings) the individuals will be put in contact with each other.