Dear Shashikant
In case of fatal Accident, you have to inform the same to Factory Inspector office (if registered under Factories Act), Labour Commissioner Office in letter format and BOCW Commissioner Office in Form 18 under BOCW Rules (In case of Construction Site). Further you can calculate the compensation amount and get confirmation for its correctness from Labour Commissioner ofice make the account payee demand draft in favour of Workmen Compensation Commissioner of your area and obtain the acknowledgement for the same.
Then the legal heir of the deceased will receive a letter from WCC and the legal heir has to bring the Birth Certificate of the Deceased, Death Certificate, Legal heir and details of family certificate, Savings account Pass Book (xerox of first page), 4 copies passport size Photos for all the legal heirs.
To process the formalities, an advocate will help the family members of the deceased to receive the funds without any hurdle. It is very difficult to understand the requirement of the Officials directly by the family members. Hence the Advocate is very much necessary. The advocate is required for the family members only, hence the family members has to make the payment for advocate. But for helping the family member of the deceased, the contractor can make the payment for the advocate.
Hope I have clarified your doubt/querry.