My brother is requesting financial documents, living wills, powers of attorney, and trust documents from my parents who are elderly but still living on their own in their home. If he files for guardianship, will I and my other siblings be contacted about the hearing?
Whoever has them shouldn't be sharing this personal information with anyone other than the people appointed in the documents. It's privileged information at this point in time.
But guardianship only applies to persons no longer able to make decisions for themselves. Would two doctors agree that your parents are incompetent? Do they have a diagnosis of dementia or some other mental impairment?
You say that he has requested documents. From whom? Has he been given them?
Who has the financial and medical POAs now?