Afridi has filed an appeal against the Rs 3 million fine and six months probation imposed on him, while Younis has challenged the indefinite ban placed on him by the Pakistan Cricket Board.
"Yes I have sent a notice to the Chief Operating Officer of the Board Wasim Bari asking him on what grounds have I been fined by the Board," Afridi said.
Afridi's decision to appeal comes just two days after he was appointed captain for the forthcoming Twenty20 World Cup in the West Indies [ Images ].
"I have taken the plea that when the Board Chairman Ijaz Butt himself has said on record that the PCB would not punish me twice for the same offence how can they fine me now for ball tampering," Afridi said.
Afridi pleaded guilty to ball tampering charges during the fifth and final One-Day International against Australia [ Images ] in Perth last month and was subsequently banned for two matches by the ICC [ Images ] match referee.
The PCB also while imposing a fine on him said that his ball tampering incident had brought Pakistan cricket into disrepute and spoilt its image.
Ahmed Qayyum, the lawyer for Younis said that he had sent a letter to the Board asking them to explain on what grounds was the indefinite ban imposed on his client.
"The chargesheet they have sent to Younis contains no proper evidence or explanation to back up the indefinite ban, there is no reasoning given for the ban," he said.
"We have basically asked the Board to provide us with solid evidence that Younis was involved in infighting with Mohammad Yousuf [ Images ] and they disrupted the team's dressing room atmosphere," he added.