officially
adverb
uk/əˈfɪʃəli/ usformally and in a way that is agreed to and arranged by people in positions of authority:
The proposed merger was announced officially by the CEO today.
as stated or accepted by people publicly, although it may not be true:
Officially he's in charge but in fact his deputy makes most of the decisions.
relating to a position of responsibility:
She has been asked to represent the department officially.