The Supreme People's Court in Ho Chi Minh City on Wednesday upheld a five-year jail term awarded to a man for "distributing propaganda to act against the State."
Phan Ngoc Tuan, 53, of Ninh Thuan Province will also be placed under house arrest for three years after serving the jail term, the court ordered.
Tuan was arrested in August 2011 and sentenced to five years imprisonment by the Ninh Thuan People's Court in a trial last June.
He appealed the ruling.
According to the indictment, between April 2010 and August 2011, Tuan received money from some individuals and organizations outside Vietnam to store and distribute documents slandering the Party and the State administration.
The documents were distributed in Ninh Thuan and some public places in HCMC and Hanoi, the indictment says.
Tuan also asked his son Phan Nguyen Ngoc Tu to post video clips with similar content on the internet, according to the indictment.