An open adoption agreement spells out the terms of the contact between the parties in an open adoption. An open adoption agreement can specify frequency and manner of contact between adoptive and birth families, and/or between siblings placed separately. However, while it may be drawn up in the form of a contract and signed by both parties, it is not legally binding.
You mentioned PA... so Im guessing thats where you are (Im in PA as well). We are adopting a child from foster care and recently went to the lawyer's office. The first step the lawyer told us about the process was to file an "intent to adopt" letter with the court. It was a formal letter that had detailed information about the child, us, bios, etc. Additionally, attached to the letter of intent had to be a copy of our child abuse clearances and a homestudy. Based on how the lawyer walked us through the paperwork, the clearances and homestudy was a must (not just b/c of foster care). He did explain all the law references to us that were in the letter, but I don't have a copy of the intent letter yet that he was filing. (It was a rough draft that we were going over). I really think you will need a lawyer. If you still want to try to do it without one, call the local court and find out what papers you need to submit to request an adoption.
An adoption is a happy time in the life of the adopting family and in the life of the child being adopted. However, adoption is a complex and intricate area of family law. Adoption in Virginia is solely the product of statutory law and therefore compliance with all of the statutory requirements is a must to make the process proceed as seamlessly as possible. Adoptions can be stressful even at the best of times because of the legal hoops an adopting family must jump through even when an adoption is not contested. When there is conflict in an adoption, the stress levels can go through the roof. For these reasons, adoption is an area of law where it is almost always recommended that a skilled and experienced family attorney be involved.