Butt and Amir filed appeals last week but at the time it was unclear whether Asif planned to follow suit after the trio were found guilty of corruption by an ICC tribunal in February for bowling deliberate no balls in a test against England and were banned for a minimum of five years.
On Tuesday, CAS confirmed it had received appeals from all three players.
"The Court of Arbitration for Sport (CAS) has registered the appeals filed by Mohammad Asif, Mohammad Amir and Salman Butt against the International Cricket Council (ICC) Anti-Corruption
Tribunal's decision of 5 February 2011," CAS said in a statement.
The trio also face criminal charges of accepting bribes and trying to defraud in a case brought by the Crown Prosecution Service and must appear in a magistrate's court on March 17 in London.
They all deny any wrongdoing.
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