There may be two types of leave - Authorized & Unauthorized. LOP is depend on balance of leave in the credit of the employee. It appears that it is Authorized LOP. There are occasions when employees may exhaust their leave but due to some unavoidable circumstances, the employee may required to take leave for genuine reason - Authorized LOP. Habitual absentee should be considered as Unauthorized LOP. For Unauthorized LOP it is better to initiate disciplinary action after proper counselling but for Authorized LOP it should not.
As Mr. Umakanthan has mentioned that lack of maintenance of leave record is also possible in the instant case.
Thanks & Regards,
S K Bandyopadhyay ( Howrah, WB)
+91 98310 81531 27th June 2019 From India, New Delhi