testacy

from The Collaborative International Dictionary of English v.0.48

Testacy \Tes"ta*cy\, n. [See {Testate}.] (Law)
   The state or circumstance of being testate, or of leaving a
   valid will, or testament, at death.
   [1913 Webster]

from Bouvier's Law Dictionary, Revised 6th Ed (1856)

TESTACY. The state or condition of dying after making a will, which was 
valid at the time of testator's death.

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