anticipatio

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
ANTICIPATION. The act of doing or taking a thing before its proper time.
     2. In deeds of trust there is frequently a provision that the income of
the estate shall be paid by the trustee as it shall accrue, and not by way
of anticipation. A payment made contrary to such provision would not be
considered as a discharge of the trustee.
    

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