My ex employer has denied paying me for my earned leaves

Hi,
I need advice and guidance on a matter of earned leave.
My ex employer has denied paying me for my earned leaves stating that under company policy it is not allowed to en-cash the earned leaves for people who have stayed less than a year in the company.
My query is if this is a legal and valid policy to implement.
Also no such condition is mentioned in my offer letter and they are also not sharing the policy document with me. on the premise that I am an ex employee now and I cannot have access to company policies.
Please guide and help.

The poster should have mentioned the type of the establishment he was employed.
Anyway whatever be the establishment and the name of the accruable leave statutorily due for encashment in case of termination of employment - E.L,P.L or Annual Leave with Wages, its calculation and credit arise only in the second consecutive year of service in the same establishment on the basis of the no. of actual days worked during the previous year.
Therefore if the poster has worked in the establishment for less than a year i.e less than 240 days, the contention of the employer would be correct.