undocumented

[uhn-dok-yuh-men-tid] /ʌnˈdɒk yəˌmɛn tɪd/
adjective
1.
lacking documentation or authentication.
2.
lacking proper immigration or working papers.
Origin
1880-85; un-1 + documented
Word Origin and History for undocumented
adj.

1883, from un- (1) "not" + past participle of document (v.).