Yes. It is a violation of law for a bank or other institution not to accept a properly completed durable power of attorney.
Banks and other similar institutions must accept a properly executed power of attorney. It is unreasonable for a third party to require their own form or to object because of the lapse of time since the execution or between signing by the principal and the agent.
If you or a family member need assistance with power of attorney me at (716) 333-5144.