Just to be clear on what a Foster Parent is: A foster-parent is a person who acts as parent and guardian for a child in place of the child's natural parents but without legally adopting the child <freedictionary.com> Now that we are clear: The definition is provided to give you an idea of what a Foster Parent is, and the difference between them and a biological parent. Foster Parents may or may not have any information about your famly history unless it is a small town and they grew up with your parents. It is a good idea to interview them to see how much they know if anything.
We provide an extensive interview list for you to ask your Foster Parent if they know/knew your biological parents. This interview checklist can be found in the Family Historian Center and the Authorized Griot Center.