1. lacking necessary documents (as for e.g. permission to live or work in a country); - Example: "undocumented aliens" - Example: "undocumented tax deductions"
WordNet (r) 3.0 (2006):
undocumented
adj 1: lacking necessary documents (as for e.g. permission to
live or work in a country); "undocumented aliens";
"undocumented tax deductions" [ant: documented]