If yours is a factory, then legally there is only one kind of leave, viz, annual leave with wages, often called Earned Leave. The number of leaves to which an employee is eligible depends on the number of days he has worked in the previous year. It is one for every 20 days worked in the previous year. Any unavailed leave shall be carried forward to the next year subject to 24 days. At the time of termination of employment, due to any reason, the unavailed leave shall be encashed.
Under the Act governing plantations and other commercial establishments, similar provisions are available. Since the law governing the latter is a state Act, there may be differences regarding the number of leaves. But I think that all states have leave rules which provide for 12 days of Earned Leave in addition to casual leaves and sick leaves. The Earned Leave, which is similar to the one mentioned in the Factories Act, can be carried forward and encashed at the time of leaving.
Please confirm under which Act your establishment comes and then follow the provisions relating to leaves under it.