My 2008 DPA for Mom was never filed but just in my possession. A joint bank account was opened prior to the 2008 DPA. Mom was diagnosed with dementia in mid-2008. Mom's check writing had to be stopped due to the confusion by the disease. Mom convinced a family member that I took her "money." That family member took her to the bank and closed our joint account thus opening a new joint account with check writing privileges for her. Bank advised DPA to reopen original joint account w/original owner. Doctor certified for social security that I be Mom's representative. Again Mom complains that she wants her money. In late 2009, my sibling: got a POA, closed our joint account, opened a new joint account, became representative payee putting passwords on accounts blocking my access. Is it legal?