This excerpt taken from the ATVI DEF 14A filed Apr 22, 2009.
Stockholder Communications with our Board
To communicate directly with our full Board, the Vivendi Directors, the Executive Directors, the Independent Directors, any committee of our Board or any individual Board member, stockholders may send written correspondence addressed to such director or directors in care of our Corporate Secretary at Activision Blizzard, Inc., 3100 Ocean Park Blvd., Santa Monica, California 90405.
All communications received as set forth in the preceding paragraph will be opened by the Corporate Secretary or his designee to determine whether the contents contain a message to one or more of our directors. Communications that relate to our accounting practices, internal accounting controls or auditing matters will be referred to the chairperson of the Audit Committee. Any other communications that are not advertising materials, promotions of a product or service, patently offensive materials or matters deemed, in the reasonable judgment of the Corporate Secretary or his designee, inappropriate for our Board will be forwarded promptly to the addressee. In the case of communications to our Board or any group or committee of directors, the Corporate Secretary will make sufficient copies of the contents to send to each director who is a member of the group or committee to which the envelope is addressed.