Yes. The 1951 Convention only protects persons who meet the criteria for refugee status. Certain categories of people are considered not to deserve refugee protection and should be excluded from such protection. This includes persons for whom there are serious reasons to suspect that: they have committed a crime against peace, a war crime, or a crime against humanity; they have committed a serious non-political crime outside their country of refuge prior to the admission to that country as a refugee; or they are guilty of acts contrary to the purposes and principles of the United Nations.