procuration

Etymology
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Noun

 * 1) The act of procuring; procurement.
 * 2) The management of another's affairs.
 * 3) The instrument by which a person is empowered to transact the affairs of another; a proxy.
 * 4) A sum of money formerly paid to the bishop or archdeacon, now to the ecclesiastical commissioners, by an incumbent, as a commutation for entertainment at the time of visitation; called also proxy.

Etymology
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Noun

 * 1) proxy
 * 2) power of attorney