undocumented

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adjective un·doc·u·ment·ed \É™n-ˈdä-kyÉ™-ËŒmen-tÉ™d\

: not having the official documents that are needed to enter, live in, or work in a country legally

: not supported by evidence that consists of documents : not having written proof

Full Definition of UNDOCUMENTED

:  not documented: as

a :  not supported by documentary evidence <undocumented expenditures>

b :  lacking documents required for legal immigration or residence <undocumented workers>

Yes, "irregardless" is a word. No, that
doesn't mean you should use it. »

Examples of UNDOCUMENTED

1. The company cannot reimburse you for undocumented travel expenses.

First Known Use of UNDOCUMENTED

1867