Dear Manish, My sincere request to all the querists, including you, is that whenever you start a thread, please do not forget to provide all the inputs relating to your query. This will enable the senior members to offer correct and appropriate advice. In your case, even though some members have replied presuming that your father-in-law has worked for more than five years in the organization, making him eligible for gratuity payment.
My second request to the members who attempt to reply is that they should familiarize themselves with the Acts and state rules before giving advice. For example, one member suggested filing a complaint with the Local Gratuity Office. I am certain that none of the governments have established such offices exclusively for handling gratuity payment cases. Such responses can confuse and puzzle the querists. I have no intention of offending anyone's feelings, only a sincere request.
Moving on to the Query
You can advise your father-in-law to submit an application in Form-I to the office of the Controlling Authority, provided he is eligible as discussed earlier. I recommend referring to your State's Payment of Gratuity Rules, as the application form may not be 'I' but could be slightly different. This will give you an idea of the specific authority that deals with these cases.
Best regards,
BS Kalsi