N.Y. General Obligations Law § 5-1504
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(d) A person that is asked to accept an acknowledged and witnessed power of attorney may request, and rely upon, without further investigation:
2. No third party located or doing business in this state shall refuse, without reasonable cause, to honor a statutory short form power of attorney properly executed in accordance with section 5-1501B of this title, or a statutory short form power of attorney properly executed in accordance with the laws in effect at the time of its execution.
(a) Reasonable cause under this subdivision shall include, but not be limited to:
(b) It shall be deemed unreasonable for a third party to refuse to honor a statutory short form power of attorney properly executed in accordance with section 5-1501B of this title or a statutory short form power of attorney properly executed in accordance with the laws in effect at the time of its execution, if the only reason for the refusal is any of the following:
3.
4.
7. When the power of attorney is presented to a third party, it shall not be deemed unreasonable for a third party to require the agent to execute an acknowledged affidavit pursuant to this subdivision stating that the power of attorney is in full force and effect. Such an affidavit is conclusive proof to the third party relying on the power of attorney that the power of attorney is valid and effective, and has not been terminated, revoked or modified, except as to any third party who had actual notice that the power of attorney had terminated, been revoked or been modified prior to the execution of the affidavit. Such affidavit shall state that: