Nonofficial (adjective)

Not having official authority or sanction.

Origin:

Derived from non- (meaning 'not') and official (meaning 'having official authority or sanction').

Examples:

1. The nonofficial ceremony was just as important to the couple as the official wedding.
2. The company only recognizes the official reports, not the nonofficial ones.
3. Nonofficial information suggests that the project may be delayed.
4. The nonofficial party was a great success, despite not being sanctioned by the university.
5. The nonofficial agreement was not legally binding, but both parties still honored it.