From USAIR Dividend Miles Guide online:
http://www.usairways.com/awa/content...aspx#memrights
(USAir) Mileage transferability
All outstanding mileage may be transferred to the estate of a member upon a member’s death, after production of appropriate documentation such as a death certificate and proof of beneficiary within 6 months of the member's passing. Miles cannot be transferred if the deceased member's account has been inactive for more than 36 months at the time of the member's passing. Mileage may not be transferred to any other person except pursuant to these rules.
DIVIDEND MILES SERVICE CENTER
US AIRWAYS
P.O. Box 025458 • Miami, FL 33102
1-800-428-4322 or better # 1-800-949-0427 per the USAir Gold line
(I got 10 or so points last year added by creating a Points.com link for a relative's USAir account, to keep the miles still active, anticipating their non-use or passing.)
*** There is always the means to transfer miles to a charity, such as ARC / make-a-wish / children's miracle network for emergency travel, etc. ****