1) Discontinuance 2) Discontinuation 1) Disherison 
• (n.) The act of disinheriting, or the condition of being; disinherited; disherison.
(from the article `inheritance`) In the modern civil law, two systems are used to provide protection against disinheritance. Under the French system, a testator who is survived by ...
n. The act of disinheriting.
Dis`in·her'it·ance noun The act of disinheriting, or the condition of being; disinherited; disherison. 
The act by which one refuses to leave property to a would-be heir.
[n] - the act by a donor that terminates the right of a person to inherit
noun the act by a donor that terminates the right of a person to inherit