1. Should we consider Probation period/ training period etc. for completion of 5 years of service while computing Gratuity Payment to the concerned employee?

Probation period/training is considered while calculating eligibility for gratuity.

Gratuity to be claimed or not or a bounty of the employer

2.If an employee left us after 5 years without claiming gratuity as part of exit ,completed all exit formalities and left. Can he come back and claim gratuity after 3 or 4 years. Is there a time period when he should make the request. What is the liability of the company in such cases?

Gratuity payment is employer liability hence employer need to ensure make payment along with Full and final of employee irrespective whether employee claims it or not. Employee can claim Gratuity any time after exit. This has been the result from many high courts’ verdict on the issue.