A more official way of getting information is through a company or government mouthpiece.
VOA: special.2010.06.20
Government-run media could also be called a mouthpiece.
VOA: special.2011.06.26
Chavez simply took over the network and turned it into another pro-government mouthpiece, in what was an effective government takeover of a private network.
To these audiences no official governmentmouthpiece no matter how professionally run or how high the integrity of reporting will have the same authority and play the same role.
During the war, Hizbullah's membership in the Siniora government worked to transform the Siniora government into a mouthpiece of Hizbullah and, through it, of Iran and Syria.