If you were adopted through American Home Finding Association your records are confidential per Iowa law. American Home Finding Association is unable to release any information from your file without a court order. However, if a child or birthparent has, in writing, stated a desire to establish contact, that information will be kept on file. If two parties have expressed a desire for contact, it may be possible to put those parties (birthparents, adoptees, siblings) in touch with one another.
The Iowa Department of Public Health also has a voluntary registry called “Mutual Consent Voluntary Adoption Registry.” For more information click here — https://dhs.iowa.gov/adoption-records