Assuming that the foster child is not actually a relative of the deceased by birth or adoption, the only other way I can think of is that the deceased left a will stating that the foster child was to inherit part of the decedent's estate. It is also possible that the inheritance was the result of previous court action that directed part of the estate to be left to the child, but this is extremely rare.
Answered on Nov 05th, 2014 at 7:34 PM