But a Federal Court judge ruled on June 1 that the newspapers had proven most of their allegations.
read moreRoberts-Smith filed an appeal on July 11, the court said in a website post, without providing any further details.
"We believe the Federal Court's judgment is comprehensive and categorical," Chessell said in a statement."
"It's a terrible outcome and it's the incorrect outcome," he was quoted telling Nine's television arm.
"We will look at (the judgement) and consider whether or not we need to file an appeal," he said at the time.
Persons:
Ben Roberts, Smith, Roberts, James Chessell, Chessell, Byron Kaye, Robert Birsel
Organizations:
SYDNEY, SAS, Victoria Cross, Nine Entertainment, Reuters, Thomson
Locations:
Afghanistan