In virtually all cases, the decision is up to the adoptive parents regarding how to inform the child that he or she has been adopted, and at what age to do so, if at all. Although a non-profit adoption agency (if one is used) might mail newsletters and solicit funds from the parents, traditionally, it has been extremely rare for them to communicate directly with the child (usually, adoption agencies do not contain the word "adoption" in their name).
Historically, the four primary reasons for married couples to obtain a child via closed adoption have been (in no particular order) infertility, asexuality, having concern for a child's welfare (i.e. would not likely be adopted by others), and to ensure the sex of the child (a family with five girls and no boys, for example). In 1917, Minnesota was the first U.S. state to pass an adoption confidentiality and sealed records law. Within the next few decades, most United States states and Canadian provinces had a similar law. Usually, the reason for sealing records and carrying out closed adoptions is said to be to "protect" the adoptee and adoptive parents from disruption by the natural parents and in turn, to allow natural parents to make a new life.
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.