Raju, along with seven others, filed the appeal in the Metropolitan Sessions Court and the matter has been posted for for hearing on April 15 about its maintainability.
"The judgement (of the special court) is legally not sustainable and defence arguments were not considered," V Surender Rao, one of the defence counsel who filed the appeal, said.
On April 9, a special court trying the SCSL accounting fraud probed by CBI, had sentenced Raju and others to seven years rigorous imprisonment after it found them guilty of criminal conspiracy as well as cheating, among other offences in the scam and also imposed a Rs 5.5-crore fine on Raju and his brother Rama Raju.