Not supported by written evidence: undocumented income tax deductions; undocumented accusations.
Not having the needed documents, as for permission to live or work in a foreign country.
A person not having proper documentation, especially for immigration.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.