"make official" is a correct and usable phrase in written English.
It is usually used to describe a process of making something legally binding or formal. For example: "The partnership was made official last week with the signing of the agreement."
Hollande plans to make official trips inside France and to European summits in Brussels by train.
I assume she is paying a lot of people a lot of money to make official statements for her.
Spread the word!" His e-mail announcement began: "Friend — I have some important news that I want to make official.
"So it seems only fitting that I make official what we've always known in our heart for years — there is only one Junior and one 55".
The Yankees have scheduled a news conference for Saturday morning, when Rivera is expected to make official that this will be his final season.
But it will also add to the severe housing shortage in Britain and make official targets even more difficult to reach.
In a break from his predecessor Nicolas Sarkozy, Mr Hollande has announced that he will make official journeys within France and to European summits in Brussels by train.
The Statistics and Registration Service Bill, expected to have its third reading in the House of Commons on March 13th, purports to make official statistics independent.
That would make official last week's agreement between Hamilton and the team on the terms of an incentive-laden, three-year, free-agent deal worth $3.6 million.
Judges said they were reluctant to speak out publicly about the violence they encountered in the courts or make official complaints for fear of increasing the threats.
Blaney and Abbott regard themselves as whistleblowers, saying if they had not encouraged people to make official complaints about Clarke he would still be running RoadTrip.
