The case concerned an interview Andy Hall gave to Aljazeera in Myanmar.
The Appeal Court decision was read at the Prakanong Court - the very Court that dismissed the alleged criminal defamation case in the first place on October 29, 2014 due to a flawed interrogation process.
The Attorney General and Natural Fruit cannot appeal further to the Supreme Court.
Hall tweeted that his legal team is prepared for a counter lawsuit "to prevent further harassment".