I found this:
According to UA's MP Program Rules:
Accrued mileage and certificates do not constitute property of the member. Neither accrued mileage nor certificates are transferable (i) upon death, (ii) as part of a domestic relations matter, or (iii) otherwise by operation of law.
But this thread seems to say a different thing:
http://www.flyertalk.com/forum/unite...ed-2010-a.html