This excerpt taken from the BP 20-F filed Jun 30, 2005.
EVENTS UPON TERMINATION
the termination of the Agreement howsoever occasioned the Executive shall unless otherwise agreed by the Company:
all property, documents and correspondence relating to the affairs of the Company or other Group Company, including books of instruction and reference and identity passes;
any time or from time to time thereafter upon the request of the Company, resign from office as a director of the Company and all other offices held by him in any other Group
Company and should he fail to do so the Company is hereby irrevocably authorized to appoint some person in his name and on his behalf to sign and do any documents or things necessary or desirable to
give effect thereto; and
Company shall be entitled to deduct from any monies due to the Executive any sums due from the Executive to the Company or any other Group Company.
Bet you've never seen portfolio analytics like these.