The Supreme Court ruled on Friday that the prison sentences handed to former judges Constantina Bourboulia and Evangelos Kalousis cannot be reversed.
The two judges, found guilty of trial fixing, had appealed their sentences.
Bourboulia was jailed for seven years and Kalousis for 12.
Kalousis was sentenced in 2009 and was released in 2012. Bourboulia was handed her prison term last year.