28 CFR 551.153 - Cancelling the notification request.
(a) A victim and/or witness may request cancellation of the notification by contacting either the Bureau of Prisons or the U.S. Attorney from the prosecuting district. The Bureau of Prisons shall notify the victim and/or witness that his or her request for notification has been cancelled.
(b) Bureau of Prisons staff may cancel a notification request when the victim and/or witness has not responded within 60 calendar days to a Bureau of Prisons inquiry concerning whether the victim and/or witness wishes to continue receiving notification of the inmate's release(s).
(c) A notification request by a victim and/or witness ordinarily terminates when the inmate has completed service of the sentence for the serious crime which resulted in the request for notification.