Life long health care worker currently working in Emergency Department as a Senior Tech as well as Nursing student. 1 of 3 children (middle child). Living Will compiled and executed while both parents were living and of sound mind that appointed oldest sibling as POA and myself as Healthcare POA. Falling out with siblings during Fathers illness, Fathers passing and Mothers hospitalization in regards to medical POA. Father passed 3/27/2017 at which time Mother had moderately severe cognitive dementia referred to as mid stage dementia and this was in March 2017 which has progressed to the point where oldest sibling felt Mother needed to be placed into a secured memory care unit at an assisted living facility for 24 hour care. During this transition it was discovered that the Healthcare POA had been changed from middle sibling with medical experience to oldest sibling without the original Healthcare POA being informed, notified or provided the opportunity to respond and/or seek legal advice/representation to agree or dispute. Oldest sibling now refuses to provide copies of such documents willingly and has directed all inquiries to attorney who prepared the documents in question. Is this legal in the state of Pennsylvania?