Semi-open adoption doesn't usually involve any post-placement, face-to-face visitation. The children involved don't normally have any direct communication with their birthparents. Like closed adoption, once a child reaches the age of majority in his or her state, they have the option of searching for or being searched for by their biological family. Unlike a closed adoption, those involved in a semi-open adoption usually have access to some basic information that can assist in the search process.
From the early 1950s when Jean Paton began Orphan Voyage, and into the 1970s with the creation of ALMA, International Soundex Reunion Registry, Yesterday's Children, Concerned United Birthparents, Triadoption Library, and dozens of other local search and reunion organizations, there has been a grass roots support system in place for those seeking information and reunion with family.
Negotiate with your biological parents and/or their representatives through a confidential intermediary. This is only an option if your parents are still alive (if they are dead, it is usually easier to unseal adoption records). Use the intermediary to explain your reasoning for wanting the records unsealed. If you can reach a mutual agreement, the records can be unsealed.
Open adoption is a form of adoption in which the biological and adoptive families have access to varying degrees of each other's personal information and have an option of contact. While open adoption is a relatively new phenomenon in the west, it has been a traditional practice in many Asian societies, especially in South Asia, for many centuries. In Hindu society, for example, it is relatively common for a childless couple to adopt the second or later son of the husband's brother when the childless couple has limited hope of producing their own child.
In all adoption searches, it is uncommon to find both the birth mother and father at the same time. A separate search, if desired, can be done afterwards for the father. Since males seldom change their surnames, and the mother might have additional information, it is usually easier than the initial search for the birth mother. In many cases, adoptees are able to do this second search for their birth father by themselves (or they try before paying for assistance).