The Collaborative International Dictionary of English v.0.48:

Procuration \Proc`u*ra"tion\, n. [L. procuratio: cf. F.
   procuration. See Procure.]
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   1. The act of procuring; procurement.
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   2. The management of another's affairs.
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   3. The instrument by which a person is empowered to transact
      the affairs of another; a proxy.
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   4. (Ch. of Eng.) A sum of money paid formerly 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.
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   Procuration money (Law), money paid for procuring a loan.
      --Blackstone.
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