Synonyms of unofficial

Adjective

1. unofficial (vs. official), drumhead, summary, informal, loose, unauthorized, unauthorised, wildcat, unsanctioned, unauthorized#1, unauthorised

usage: not having official authority or sanction; "a sort of unofficial mayor"; "an unofficial estimate"; "he participated in an unofficial capacity"

2. unofficial, unconfirmed (vs. confirmed)

usage: not officially established; "the early election returns are unofficial"