Definition: Foreigners whose entry or stay is not sanctioned
Migration statistics - UNO
This category includes foreigners who violate the rules of admission and stay of the receiving country and are deportable, as well as foreign persons attempting to seek asylum but who are not allowed to file an application and are not permitted to stay in the receiving country on any other grounds.
United Nations, "Recommendations on Statistics of International Migration", Revision 1, Statistical Papers, Series M, No. 58, United Nations, New York, 1998