Hi Marion,
Some questions:
- Who is the principal (i.e. power to attorney given by whom)? If it is by both your mother and later father, is this contained in one document or executed by each parent individually in separate documents?
- Are you named as the attorney in this power to attorney document executed by the principal?
- Are you asking whether you can use it to administer your father's estate or over your mother's affairs or both?
If the power of attorney is validly executed and you are the named attorney, you can exercise it under the conditions stated in the POA document (i.e. scope of power, when to exercise, what you can do). The document to clearly specify what you can do and when.