Yes you can send the notice by mail.

Your facts are too complicated for a general question and answer site. It seems like your sister may have done some things wrong. See an attorney.

Show the trust and POA to an attorney. Unless the POA gave her the right to create a trust with a POA, the trust is invalid. You are waiting to...

You are not still married since she is gone. You were married at the time of her death however. Speak with an attorney.

Complete the forms with the DMV. First one for lost title, second one for transfer on death.

You are trying to draft one - they are not forms, they need to be specifically drafted on pleading paper. You have asked a few questions about...

You may just want to have your trust reviewed to confirm, but and major, widespread changes are not anticipated imminently.

Petition for Removal, Accounting and Surcharge. You should hire an attorney as these are complicated and take a long time.

Just the heirs who will inherit, which should be children and/or grandchildren in the event a child has died with issue.

I understand your fears. You have to chose what makes most sense to you under the circumstances. I agree she has no legal right but when someone...