officially
adverb
əˈfɪʃəli 
əˈfɪʃəli 
1 publicly and by somebody who is in a position of authorityThe library will be officially opened by the local MP.We haven't yet been told officially about the closure.The college is not an officially recognized English language school.2 according to a particular set of rules, laws, etcMany of those living on the streets are not officially homeless.I'm not officially supposed to be here.3 according to information that has been told to the public but that may not be trueOfficially, he resigned because of bad health.Opposite
unofficially