My mother's existing POA (her daughter) has abandoned caregiver and oversight responsibilities.
After her months long absence and no contact with any family or our mom, the remaining sibs sent her a registered letter a year ago asking if/how she wanted to be involved and got no response. My question is, how do we legally change the POA, DPOA and guardianship? Is it as simple as replacing her name with another in the existing documents (mom has revocable trust), having them signed and notarized? Do we then need to inform all financial institutions and investments?