Adocument signifying a principal to delegate to another person the authority to act on the principal’s behalf is known as:

Durable power of attorney

Explanation:

Durable power of attorney is the legal document that is made for authorizing another person or party to act and take actions on behalf of the original party. This document is made for the party who is not capable to make their own decisions on personal ,legal or business matters.

The authorization party is known as grantor who grant this authority to other party  for taking decisions on financial matter,health matter etc. Duration of this document stays even when grantor becomes incapacitated.  

are there any options?

answer; exaggerate what you believe is the deception and state it, hoping that the other will jump in to "correct" the statement;