PBGC's formal determination of the benefit amount, which may be different than the estimated benefit, can be appealed. (pbgc.gov)
[215] For Aristotle, indeed, this stress on formal determination as the ground of entity leads also to his limitation of what can be called «entity» in the full sense of the word. (religion-online.org)
See PBGC's Appeal Board, Appealing Formal Determinations, and Your Right to Appeal for more information. (pbgc.gov)