The court found Piya Julkittiphan guilty of posting two pictures of His Majesty on a Facebook wall with insulting messages in 2013.
The court ruled that although the Facebook account belonged to Pongsathorn Bunthon, the court believed in evidences of public prosecutors that Piya and Pongsathorn were the same man.
The court initially sentenced Piya to nine years in jail but commuted the penalty by one third to six-year imprisonment.