Beleaguered all-rounder Rana Naved has also sent a legal notice to the Pakistan Cricket Board (PCB) against the 12-month ban and Rs 2 million fine imposed on him by the board in early March.
Sources close to Rana said he had sent the notice after consulting his lawyers who had told him that he had a strong case and the ban could be overturned.
Tafazzul Rizvi, the legal advisor of the board confirmed they had got a notice from Rana but refused to divulge its details.
"We have received a notice but we have not gone through it as yet. We will send a reply after examining the contents of the notice," he said.
The board sent a reply to Younis Khan declining to give any explanation for the indefinite ban imposed on the former captain.
Rizvi said Younis would have to file a formal appeal after which the board would respond to his queries on the charges made out against him by the board.
Younis' lawyer Ahmed Qayyum said he was disappointed by the board's attitude.
"It is disappointing that they are not willing to share with us the reasons for imposing the ban on my client. It is a case of an inquiry committee taking a decision behind closed doors without bothering to explain the charges against my client," he said.
Qayyum said that he would be speaking to Younis before deciding on sending a formal appeal.
"But the thing is that apparently the board has gone ahead and announced punishments without preparing ground for it and now they are seeking time to defend their actions," he added.