unofficially

US /ˌʌn.əˈfɪʃ.əl.i/
UK /ˌʌn.əˈfɪʃ.əl.i/
"unofficially" picture
1.

officieusement

without official authorization or approval; not formally acknowledged.

:
He was unofficially appointed to the position.
Il a été nommé officieusement au poste.
The news spread unofficially through the office.
La nouvelle s'est répandue officieusement dans le bureau.