Family member certificate

My friend's father is a private contract employee in AdhraPradhesh state and had died due to cancer. Friend father has nominated my friend name in his PF nomination(100%) and employer records. Friend family got death certificate from municipality, could not able to get the family member certificate. When my friend tried to claim PF settlement, the PF office are asking for Family member certificate even though he is got (100%) nomination. Now the problem here is, friend father has outside family relationship with other women, now she is trying to claim the amount and creating issues at MRO office for issuing family certificate for my friend and his family. She is having two children, claiming them born to friend's Father.(we are not sure if this claim is correct) Please suggest bellow. 1. Can we get the PF settlement without family member certificate? 2. If not, how to proceed to get the certificate, as the other women(she has previously married multiple men, not given any divorce to them, and made a relationship with my friend father just for money again), threating MRO office staff for legal issues if they issue certificate for my friend.