In general the balance ELs as on his/ her last working day will be en-cashed & paid along with his full and final settlement amount. In most of the cases CL & SL are not en-cashed, in most of the organizations balance C.Offs are also en-cashed and paid. An amount equal to number of excess leaves availed is also going to be deducted from the eligible F&F amount and settled. If your organization is having any specific rules ( Leave policy / memorandum of settlement / Certified standing orders / HR Hand book) with respect to leave encashment then you need to work out accordingly and pay.
Thanks and regards
Kamesh 2nd June 2018 From India, Hyderabad