"official terms" is correct and can be used in written English.
Example: According to the contract's official terms, the buyer is responsible for all shipping and handling fees.
Which, in official terms, doesn't count.
But in official terms, he has simply vanished.
But they commit what a senior official terms "breaches of etiquette".
The official terms of visiting rights for Mr. Batista, who lives in Queens, were unclear.
The official terms of use for Skype, the popular phone and messaging service, also include an indemnification clause.
Cosby's relationship with Constand began on official terms, through his alma mater, Temple University, where she worked at the time.
To use the correct official term, I was..
The official term for this segregation was "labor-based distribution".
Now the official term is "the January 25 June 3030 Revolution".
The official term for their condition is "cold-stunned".
"Yeah, 'without specialty' is our official term," Jeremy says.
