Haider Ali has been fined 30% of his match fee after showing his bat to the umpire following his dismissal during the clash between Northern and Central Punjab on Saturday.
Haider was found guilty of breaching the PCB Code of Conduct for Player and Player Support Personnel for the incident that occurred in the ninth over of Northern's innings.
The young batting sensation was adjudged lbw off the bowling of Usman Qadir, sparking a peeved response from Haider, who gesticulated to his bat indicating the ball might have clipped the blade before brushing his pad.
Haider's actions were deemed as a disagreement over the decision and are considered to be a Level 1 offence relating to showing dissent at an umpire's decision.
The 20-year-old pleaded guilty and accepted the sanction imposed on him by match referee Iftikhar Ahmed. The charge for violation of Article 2.8 was levelled by on-field umpires Aftab Gillani and Faisal Khan Afridi, television umpire Waleed Yaqood and fourth umpire Nasir Hussain.
While Haider could contribute only three runs to Northern's total in the encounter against Central Punjab, the Shadab Khan-captained side managed to stay unbeaten by defeating the opposition by 35 runs.
The right-handed top-order batsman experienced a brilliant start to the tournament when he smashed 90 on the opening day of National T20 Cup against Khyber Pakhtunkhwa.
Last month, Haider announced his arrival onto the international scene by slamming a belligerent fifty in his debut T20I against hosts England to set up a series-levelling win for Pakistan.