Unofficial

Something unofficial is not established or authorized by an authority. It can also be a person not acting with official authority.

Unofficial Bar, in Sri Lankan courts
Unofficial collaborator, former East Germany
Unofficial hearing, in US Congress
Unofficial magistrate, in Sri Lanka
Unofficial Member, Hong Kong
Unofficial patch, computer software
Unofficial Saint Patrick's Day, a local alternative celebration date for Saint Patrick's Day for students at the University of Illinois Urbana-Champaign

See also