If the power of attorney was issued by the individual, it cannot include the authority to act on behalf of the business if the business is a corporation. The individual owner of the corporation and the corporation are separate legal persons and one cannot appoint an agent for the other.
Theoretically, a corporation can, after having a corporate vote on the matter, issue a power of attorney to an individual with power to act on the corporation's behalf. But it could also simply vote to designate the same individual an authorized signer with authority to obtain account information. The latter is what you should be looking for.
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8