1) Lacking necessary documents 2) Unregistered 3) Unsupported 
[Adjective] Describes someone who does not have the official papers that they need to live or work in a country.
The term used to describe foreign nationals who are present in the U.S. without lawful status. The term can refer to those who entered the U.S. without inspection (by crossing the border), those who overstayed their allotted time here, or those who violated the terms of their legal status. With very limited exceptions (notably asylum and immediate ...
[adj] - lacking necessary documents (as for e.g. permission to live or work in a country)
adjective lacking necessary documents (as for e.g. permission to live or work in a country); `undocumented aliens`; `undocumented tax deductions`
lacking documentation or authentication. · lacking proper immigration or working papers.
lacking necessary documents