Reports from Pakistan suggest that former captain Shahid Afridi has admitted to breaching the PCB's code of conduct according to a board official.
The 31-year-old all-rounder abruptly announced his retirement from international cricket on Monday following a spat with coach Waqar Younis, accusing the Pakistan Cricket Board of mistreating him.
In reponse the board suspended his central contract, revoked his no-objection certificates, which he officially needs to play abroad, and stopped his contract payment.
According to PCB spokesman Nadeem Sarwar, Afridi admitted to breaching the code of conduct in his reply to the showcause notice.
"Yes, we have received his reply to the show cause notice in which he has accepted that he violated the code of conduct he signed with the Board," Sarwar said. "The next course of action will be decided soon."
Afridi earlier withdrew from the two-match series against Ireland to attend his ailing father in the United States.
The all-rounder is currently in England to play in the Twenty20 league for Hampshire, but did not take the field on Wednesday after the England and Wales Cricket Board ruled him ineligible following the PCB withdrawing permission.