Main entry: undocumented
Definition: lacking necessary documents (as for e.g. permission to live or work in a country)
Usage: undocumented aliens; undocumented tax deductions
Antonyms: documented
Definition: furnished with or supported by documents
Antonyms: registered
Definition: listed or recorded officially
Antonyms: registered
Definition: (of animals) officially recorded with or certified by a recognized breed association; especially in a stud book