Heir certificate

In case of moveable properties like Bank Account, PF etc. you need to apply at local Tahsildar office or online along with Death certificate  + Affidavit + Proof of relationship (ration card, voter ID, Aadhaar, school records) + Ration card or residence proof

After that verification will be done by revenue officials or police. Then only you will be issued heir certificate Issued in 15–30 days (varies by state)

In Case of immovable property or large movable assets (shares, securities, etc.) when there is no will, you need to file petition in District Court having jurisdiction where deceased lived or property is situated