uncustomed
adjective
un·customed
"+
1
: not having passed through the customs
was charged with being in possession of uncustomed goods 
Auckland (New Zealand) Weekly News
Auckland (New Zealand) Weekly News2
archaic : unaccustomed
3
archaic : unusual
Word History
Etymology
in sense 1, from Middle English, from un- entry 1 + custom, customs + -ed; in other senses, from un- entry 1 + customed, past participle of custom