The IEEE strongly discourages changes and, in particular, withdrawals of papers once submitted and included in the program. To avoid the likelihood of this, the author is strongly encouraged to get all necessary company and/or government approvals prior to submitting his/her paper to the conference.
If under any circumstances it becomes necessary for the author to withdraw or change a paper, IEEE policy dictates that the request to do this must come directly from the author and not from any third party. IEEE policy also states that in this case, the author will be held liable for all costs that are incurred. It would then be up to the author to get reimbursed for the expense from any third party if he/she feels it is justified. The IEEE cannot act as a policing entity on behalf of the author in this regard.