They appealed against the court ruling by claiming High Court Judge Gihan Kulatunga's verdict to be erroneous.
The suspects had been accused of using TRC funds worth Rs 600 million to purchase 'sil' material during the previous elections.
Accordingly, they were sentenced to three years of rigorous imprisonment by the Colombo High Court. They were instructed to pay a fine of Rs 2 million and a sum of Rs 50 million each to the TRC.
The appeal is being heard before Justices Deepali Wijesundera and Achala Wengappuli.